Hepatocellular Carcinoma

Hepatocellular carcinoma represents one of the most significant primary liver cancers occurring in reptiles, arising from the hepatocytes, which are the main functional cells of the liver. This malignant tumor can occur in virtually any reptile species and carries a serious prognosis due to the vital metabolic functions performed by the liver and the typically advanced stage at which liver tumors are detected. The liver plays central roles in metabolism, detoxification, protein synthesis, and numerous other essential functions, meaning that cancer affecting this organ has profound implications for overall health. Understanding hepatocellular carcinoma is important for reptile keepers, particularly those with geriatric animals or species that appear to have higher tumor incidence.

Hepatocellular carcinoma has been reported in a wide range of captive reptile species. Bearded dragons, as popular pets that frequently receive veterinary care, are commonly diagnosed with this and other liver tumors. Various snake species develop hepatocellular carcinoma, with some studies suggesting relatively high rates of liver tumors in snakes compared to other reptile groups. Chelonians, including both turtles and tortoises, develop liver cancers, particularly as they reach advanced ages given their potential for extreme longevity. Monitor lizards and other large lizards maintained in captivity also develop hepatic neoplasia. The prevalence appears to increase significantly with age across all species, making geriatric reptiles a particularly at-risk population.

The impact of hepatocellular carcinoma on reptile health is profound due to the liver's critical functions. As the tumor grows and replaces normal liver tissue, hepatic function progressively declines, leading to metabolic disturbances, coagulation abnormalities, and toxin accumulation. The liver's role in metabolism means that reptiles with significant liver disease often show weight loss, muscle wasting, and general debilitation even if they continue to eat. Hepatocellular carcinoma can metastasize to other organs, most commonly the lungs and other abdominal structures, spreading the disease beyond the liver. Because reptiles hide signs of illness and the liver has substantial reserve capacity, hepatocellular carcinoma is often advanced by the time clinical signs become apparent, limiting treatment options.

Treatability of hepatocellular carcinoma in reptiles is limited and depends heavily on the extent of disease at diagnosis. Surgical resection of liver tumors is possible in some cases, particularly when the tumor is localized to a portion of the liver and has not metastasized. However, the often advanced stage at diagnosis and the technical challenges of liver surgery in reptiles mean that many cases are managed palliatively rather than with curative intent. Supportive care focuses on maintaining quality of life and managing symptoms for as long as possible. Early detection through regular veterinary examinations with a reptile-experienced veterinarian offers the best opportunity for identifying liver masses before they become too advanced for intervention.

The exact causes of hepatocellular carcinoma in reptiles remain largely unknown, representing a significant gap in reptile oncology knowledge. Unlike some mammalian liver cancers where specific causes such as viral hepatitis or chemical carcinogens have been identified, reptile hepatocellular carcinoma typically develops without clearly identifiable causative factors. However, several potential contributors have been proposed, including chronic liver disease, toxic exposures, dietary factors, and possibly viral agents. The multifactorial nature of cancer development suggests that individual reptiles may develop hepatocellular carcinoma through various pathways rather than any single mechanism.

Chronic liver disease and inflammation may predispose reptiles to hepatocellular carcinoma development. Hepatic lipidosis, or fatty liver disease, is common in captive reptiles and results from metabolic dysfunction often related to inappropriate diet or husbandry. Chronic inflammation associated with conditions such as hepatic lipidosis may create an environment conducive to neoplastic transformation over time. Repeated hepatocyte injury and regeneration associated with chronic liver disease has been implicated in liver cancer development in other species. Parasitic infections affecting the liver, bacterial infections, and other causes of chronic hepatitis may similarly contribute to long-term liver damage that predisposes to cancer.

Toxic exposures potentially contributing to hepatocellular carcinoma development in reptiles include various environmental and dietary factors. The liver processes and detoxifies many substances, and chronic exposure to toxic compounds may damage hepatocytes and potentially contribute to carcinogenic changes. Potential sources of hepatotoxic exposure include contaminated substrates, improperly treated water, environmental pollutants, and toxins present in prey items. Mycotoxins, which are fungal toxins that can contaminate grains and prey animal feed, are known hepatotoxins and carcinogens in some species. While specific toxin exposures causing reptile liver cancer have not been definitively established, the potential for such exposures should be considered.

Dietary factors may influence liver health and potentially hepatocellular carcinoma risk. Diets inappropriate for the species can lead to metabolic stress and chronic liver changes. High-fat diets contributing to hepatic lipidosis are common in captive reptiles fed inappropriate prey or excessive amounts. Vitamin and mineral imbalances may affect liver function over time. Poor quality or contaminated food items could introduce hepatotoxic substances. While direct causal relationships between specific dietary factors and hepatocellular carcinoma have not been established in reptiles, maintaining appropriate nutrition supports overall liver health.

Viral agents have been implicated in various reptile tumors, and the possibility of viral contributions to hepatocellular carcinoma cannot be excluded. Some retroviruses and other viral families have been associated with reptile neoplasia. Viral hepatitis could theoretically contribute to chronic liver inflammation predisposing to cancer development, though specific viruses causing hepatocellular carcinoma in reptiles have not been identified. Genetic factors likely influence cancer susceptibility, though specific genetic mutations associated with reptile hepatocellular carcinoma are not characterized. Age-related accumulation of cellular damage and mutations may contribute to tumor development in geriatric reptiles.

Early symptoms of hepatocellular carcinoma in reptiles are typically subtle and nonspecific, often going unnoticed until the disease has progressed significantly. Initial signs may include minor changes in appetite, with reptiles showing decreased interest in food or eating smaller amounts than usual. Slight changes in activity level, with reduced exploration and increased resting, may occur. Subtle color changes in the skin may be present but are easily overlooked. The liver has substantial functional reserve, meaning that significant disease can be present before clinical signs develop. These early nonspecific signs could be attributed to many conditions, making early-stage hepatocellular carcinoma particularly challenging to detect without routine veterinary examination including diagnostic testing.

As hepatocellular carcinoma progresses, more pronounced symptoms typically develop. Progressive weight loss becomes apparent despite adequate food availability, as the failing liver cannot properly process nutrients. Muscle wasting may become visible, particularly noticeable in limbs and the tail base. Anorexia may progress from reduced appetite to complete refusal to eat. Overall activity and alertness typically decline, with affected reptiles becoming increasingly lethargic. Weakness may become apparent, with reptiles showing reduced grip strength or difficulty with normal movement. These systemic effects reflect both the metabolic consequences of liver failure and the general debilitation associated with advanced cancer.

Behavioral changes associated with hepatocellular carcinoma often involve alterations in thermoregulation and normal activity patterns. Changes in basking behavior may occur, with some reptiles seeking heat more frequently as a response to illness while others become less interested in thermoregulating normally. Hiding behavior often increases as the reptile feels unwell. Interest in the environment typically decreases, with affected reptiles becoming less responsive to stimuli that would normally attract attention. The normal circadian rhythm of activity may be disrupted. Some reptiles may show signs of discomfort or changes in temperament.

Physical symptoms of hepatocellular carcinoma can include visible changes indicating liver dysfunction. Jaundice, or yellowing of tissues, may be visible in mucous membranes, the whites of the eyes, or ventral scales, though this can be difficult to detect in reptiles with yellow coloration. Abdominal distension may occur from liver enlargement, tumor mass, or ascites (fluid accumulation in the body cavity). In some cases, the enlarged liver or tumor mass may be palpable during examination. Coagulopathy from reduced liver production of clotting factors may manifest as unusual bruising, prolonged bleeding from minor wounds, or blood in feces. Edema or swelling may develop in some cases.

Symptom progression in hepatocellular carcinoma typically follows a gradual course but may accelerate as liver function becomes critically compromised. Initial subtle changes progress over weeks to months to obvious debilitation. Appetite may fluctuate before eventually declining to complete anorexia. Weight loss becomes increasingly severe, potentially progressing to cachexia. Signs of hepatic encephalopathy may develop in advanced cases, with neurological abnormalities including disorientation, abnormal behavior, or seizures resulting from toxin accumulation that the failing liver cannot clear. The slow progression is characteristic of reptile diseases but means that by the time symptoms are obvious, disease is typically advanced.

Emergency symptoms requiring immediate veterinary attention include sudden collapse or extreme weakness, severe jaundice, significant bleeding, neurological abnormalities such as seizures or severe disorientation, acute abdominal distension, and any sudden deterioration in condition. Hemorrhage from tumor rupture represents a life-threatening emergency. Signs of severe systemic illness such as extreme lethargy, unresponsiveness, or respiratory distress warrant urgent evaluation. Any reptile with known or suspected liver disease that shows acute worsening should be seen immediately.

Diagnosis of hepatocellular carcinoma in reptiles requires comprehensive evaluation by a veterinarian experienced in reptile medicine. The diagnostic process begins with detailed history taking, including information about the reptile's age, diet, husbandry conditions, exposure to potential toxins, and the progression of clinical signs. Physical examination includes assessment of body condition, hydration status, mucous membrane color, and careful palpation of the abdomen to detect liver enlargement or masses. Husbandry review helps identify potential contributing factors and rules out husbandry-related causes of similar symptoms. The clinical presentation of hepatocellular carcinoma overlaps with many other conditions, making thorough diagnostic workup essential.

Diagnostic imaging plays a central role in identifying liver masses and characterizing their extent. Radiographs may reveal hepatomegaly (liver enlargement) or visible masses, and can help identify metastatic disease in the lungs. Changes in organ position due to liver enlargement may be visible. Ultrasound examination is particularly valuable for evaluating liver structure, allowing visualization of masses, assessment of liver tissue echogenicity, and examination of other abdominal organs for metastasis or related changes. Ultrasound can also guide sampling procedures such as fine needle aspiration. CT scans, available at specialized veterinary facilities, provide detailed three-dimensional imaging that assists in determining tumor extent and surgical planning.

Laboratory testing is essential for evaluating liver function and overall health status. Blood chemistry panels reveal liver enzyme elevations (including AST, ALT, and others) that indicate hepatocyte damage or bile duct involvement. Total protein, albumin, and globulin levels reflect the liver's synthetic capacity. Blood glucose may be affected due to the liver's role in glucose metabolism. Bile acids testing provides information about liver function, though interpretation in reptiles requires species-specific reference ranges. Complete blood count may reveal anemia, changes in white blood cell counts, or evidence of coagulopathy. Coagulation testing may be performed to assess bleeding risk before invasive procedures.

Definitive diagnosis of hepatocellular carcinoma requires histopathological examination of liver tissue. Fine needle aspiration of liver masses can be performed with ultrasound guidance and may provide cytological information, though the cellular characteristics that distinguish hepatocellular carcinoma from other liver tumors or benign conditions may not always be clear on cytology alone. Surgical biopsy provides larger tissue samples for detailed histopathological analysis, allowing definitive identification of tumor type and assessment of malignancy. The decision to pursue biopsy must balance the diagnostic value against procedure risks, particularly in debilitated patients. Differential diagnoses include benign liver tumors, hepatic lipidosis, hepatic abscesses, granulomatous disease, and metastatic tumors from other primary sites, all of which must be considered in the diagnostic process.

Treatment of hepatocellular carcinoma in reptiles is challenging due to the typically advanced stage at diagnosis and the vital functions of the liver. The foundation of any treatment approach begins with optimizing husbandry conditions to support the reptile through the illness and any interventions undertaken. Proper temperature maintenance is critical, as reptile metabolism, immune function, drug metabolism, and healing capacity are all temperature-dependent. The enclosure should provide appropriate temperature gradients and be modified as needed to ensure easy access to heat sources for debilitated patients. Reducing stress through appropriate hiding spaces and minimal handling supports overall health during treatment.

Surgical intervention may be considered when hepatocellular carcinoma is localized and has not metastasized, though this represents a minority of cases. Partial hepatectomy, or surgical removal of the affected liver lobe, may be curative if the tumor is completely excised and there is sufficient remaining normal liver tissue. The liver has regenerative capacity, which can allow recovery of function after partial removal. However, liver surgery in reptiles is technically demanding and carries significant risks including hemorrhage from the highly vascular liver tissue. Pre-surgical assessment must confirm adequate remaining liver function and absence of metastasis. Anesthesia for liver surgery requires careful management given the liver's role in drug metabolism.

Medical management focuses on supporting liver function and managing symptoms when surgical intervention is not feasible or as an adjunct to surgery. Hepatoprotective medications may be prescribed to support remaining liver function, though evidence for their efficacy in reptiles is limited. Fluid therapy helps maintain hydration and supports metabolic function. Nutritional support is essential, with diet modifications to reduce metabolic stress on the liver while maintaining adequate nutrition. Easily digestible, appropriate foods and potentially assist feeding may be needed for reptiles with reduced appetite. Antibiotics may be necessary to treat secondary infections. Medications to manage ascites or other complications may be indicated.

Supportive care forms a critical component of hepatocellular carcinoma management. Fluid therapy addresses dehydration and helps maintain metabolic function. For reptiles unable to eat voluntarily, assisted feeding through syringe feeding or feeding tube placement ensures nutritional intake. Environmental modifications ensure easy access to water, food, and appropriate temperatures without excessive exertion. Pain management with appropriate analgesics may be needed. Vitamin supplementation may support liver function and overall health. The goal of supportive care is maintaining the best possible quality of life whether as an adjunct to treatment or as the primary approach for cases where curative treatment is not possible.

Species-specific considerations influence treatment approaches. Chelonians present surgical access challenges due to their shell. Different lizard and snake species have varying anatomical considerations and physiological responses affecting anesthetic and surgical approaches. The size of the reptile affects feasibility of surgical procedures and precision of medication dosing. Species-specific dietary and environmental requirements must be maintained throughout treatment.

Prognosis for hepatocellular carcinoma in reptiles is generally guarded to poor, particularly for advanced or metastatic disease. Early detection of localized tumors amenable to surgical resection offers the best outcomes. Treatment timelines are extended compared to mammals, with recovery from any intervention taking weeks to months. Regular monitoring through follow-up examinations and blood work helps assess response to treatment and detect progression or complications. Honest discussions about prognosis help owners understand the likely course of disease and make informed decisions about treatment intensity and quality of life considerations.

Recovery from hepatocellular carcinoma treatment in reptiles, when treatment is undertaken, requires extensive supportive care and patience. The timeline for recovery is prolonged compared to mammalian patients, reflecting the slower metabolism and healing capacity of ectothermic animals. Reptiles that undergo successful surgical resection of localized tumors may begin showing improvement within weeks, but full recovery of liver function and overall condition typically takes several months. During the recovery period, close attention to husbandry, nutrition, and monitoring for complications is essential. For reptiles receiving palliative care rather than curative treatment, the focus shifts to maintaining quality of life for as long as possible.

Post-treatment husbandry optimization is critical for supporting recovery from hepatocellular carcinoma treatment or managing ongoing disease. Temperature management is paramount, with basking temperatures maintained at appropriate levels to support liver function, immune response, and healing. The temperature gradient must allow behavioral thermoregulation, which is particularly important for ill reptiles. Humidity should be appropriate for the species to support hydration and overall health. The enclosure should be simplified during recovery to reduce stress and facilitate monitoring, with easy access to water and hiding spaces. Substrate should be clean and easy to monitor for changes in fecal output or signs of bleeding.

Prognosis for reptiles with hepatocellular carcinoma varies significantly based on disease extent and treatment undertaken. Localized tumors that can be completely surgically excised may have a reasonable prognosis if adequate liver function remains and no metastasis has occurred. However, many cases are diagnosed at advanced stages where complete resection is not possible, metastasis has already occurred, or liver function is severely compromised. These cases carry a guarded to poor prognosis regardless of treatment intensity. The overall health and age of the reptile influence recovery capacity and prognosis. Honest prognostic discussions with your veterinarian help set realistic expectations.

Long-term monitoring is essential for any reptile diagnosed with hepatocellular carcinoma. Follow-up veterinary examinations should be scheduled regularly, with frequency determined by the individual case. Blood work including liver function tests helps monitor remaining liver function and detect changes over time. Periodic imaging may be recommended to monitor for tumor recurrence or progression of remaining disease. Owners should maintain careful records of weight, appetite, activity level, and any concerning symptoms. Any changes suggesting worsening liver function or disease progression, such as declining appetite, weight loss, jaundice, or neurological changes, should prompt veterinary evaluation. Even with apparently successful treatment, owners should remain vigilant for signs of recurrence or new disease.

Prevention of hepatocellular carcinoma in reptiles is challenging due to incomplete understanding of the exact causes. However, maintaining optimal liver health through proper husbandry and nutrition may reduce risk by minimizing chronic liver stressors that could potentially contribute to cancer development. Preventing hepatic lipidosis, the most common liver disorder in captive reptiles, is a key focus. This involves feeding species-appropriate diets in appropriate amounts to prevent obesity, ensuring proper temperature gradients for normal metabolism, and providing regular opportunities for exercise and natural behaviors.

Proper husbandry supports overall liver health and may reduce cancer risk indirectly. Species-appropriate temperature gradients are essential, as temperature directly affects reptile metabolism including liver function. Adequate basking temperatures allow normal metabolic processes, while cool zones provide thermoregulatory options. UVB lighting, essential for most diurnal reptile species, supports calcium metabolism and overall health. Appropriate humidity prevents dehydration, which stresses metabolic function. Regular photoperiod cycles help maintain normal metabolic rhythms. Clean, appropriate substrates and enclosure sanitation reduce potential exposure to pathogens or toxins that could affect liver health.

Dietary considerations are particularly important for liver health. Feeding species-appropriate diets prevents the metabolic stress associated with inappropriate nutrition. Avoiding overfeeding prevents obesity and associated hepatic lipidosis. High-quality prey items for carnivorous reptiles reduce potential toxin exposure. Properly gut-loaded and supplemented prey ensures appropriate nutrition. For herbivorous reptiles, providing varied, species-appropriate vegetation with proper calcium supplementation supports metabolic health. Avoiding foods that could be contaminated with mycotoxins or other hepatotoxins is prudent. Fresh, clean water should always be available.

Reducing potential toxic exposures may support long-term liver health. Using appropriate, non-toxic substrates reduces potential for harmful exposure. Water quality should be maintained, particularly for aquatic or semi-aquatic species. Avoiding use of pesticides, chemical cleaners, or other potentially toxic substances near reptile enclosures is important. Ensuring prey items come from reputable sources reduces risk of contaminated food. Environmental enrichment items should be made of non-toxic materials.

Regular veterinary care with a reptile-experienced veterinarian enables early detection of liver disease before it progresses to cancer or catches cancer at early, potentially treatable stages. Annual or biannual wellness examinations provide professional assessment of liver health through blood testing. Routine blood chemistry panels can detect liver enzyme elevations indicating early disease. Imaging may be performed as part of health screening in older reptiles. Any signs of possible liver disease such as appetite changes, weight changes, or color changes should prompt veterinary evaluation. Early intervention in liver disease may prevent progression and potentially reduce cancer risk.

Living with and managing a reptile diagnosed with hepatocellular carcinoma requires ongoing attention to liver-supportive care, symptom management, and quality of life assessment. Whether the reptile has undergone treatment or is receiving palliative care, the focus is on maintaining the best possible quality of life while monitoring for disease progression. Understanding the particular needs of reptiles with liver cancer helps owners provide appropriate care and make informed decisions throughout the illness.

Environmental management should support liver function and overall comfort. Temperature gradients must be precisely maintained, as proper thermoregulation is essential for metabolism, drug processing, and immune function. The basking spot should be easily accessible without requiring excessive exertion. Appropriate humidity supports hydration, which is important for metabolic function and toxin clearance. The enclosure setup should allow easy access to fresh water, food, and hiding areas. Bright lighting appropriate for the species supports normal circadian rhythms and behavior. The environment should be kept clean to minimize stress on the liver from processing environmental pathogens or toxins.

Dietary management is particularly important for reptiles with hepatocellular carcinoma. The diet should be appropriate for the species while being easily digestible to minimize metabolic stress on the liver. Smaller, more frequent meals may be easier to process than large feedings. High-quality protein sources support tissue maintenance without overwhelming liver function. Avoiding fatty foods helps reduce hepatic workload. Adequate hydration should be ensured through provision of fresh water and potentially soaking for species that benefit from this. Nutritional supplements may be recommended by your veterinarian to support remaining liver function. For reptiles with reduced appetite, assisted feeding may be necessary to maintain nutrition.

Health monitoring for reptiles with hepatocellular carcinoma requires attention to indicators of liver function and overall condition. Daily observation should note appetite, activity level, and any visible changes such as color. Weight should be measured regularly using an appropriate gram scale, with tracking of trends over time. Fecal output should be monitored for changes in frequency, consistency, or appearance that might indicate worsening liver function. Behavioral changes, including alterations in basking, activity patterns, or responsiveness, should be noted. Any signs of neurological abnormalities, jaundice, bleeding, or acute deterioration warrant immediate veterinary attention. A log of these observations provides valuable information for veterinary consultations.

Quality of life assessment is essential for making appropriate care decisions throughout the course of hepatocellular carcinoma. Key factors include whether the reptile is eating (even if with assistance), maintaining hydration, able to thermoregulate, and showing interest in its environment. Signs of comfort or discomfort should be assessed, though pain evaluation in reptiles is challenging. Severe weight loss, persistent refusal to eat, neurological abnormalities, or complete withdrawal from normal activities suggest declining quality of life. Regular discussions with your veterinarian help guide decisions about treatment intensity and when palliative care is no longer providing adequate quality of life. Planning for end-of-life decisions in advance reduces stress when these decisions must be made.

Hepatocellular carcinoma can occur in virtually any reptile species, with certain groups appearing in veterinary reports with some regularity. Snakes have been reported to have relatively high rates of liver tumors compared to some other reptile groups, with hepatocellular carcinoma being among the tumor types diagnosed. Various snake species appear susceptible, though species-specific risk differences are not well characterized. The long lifespans achievable by some snake species in captivity may contribute to age-related tumor development. Bearded dragons, as commonly maintained pet reptiles that receive frequent veterinary care, are regularly diagnosed with liver tumors including hepatocellular carcinoma.

Chelonians, including both turtles and tortoises, develop hepatocellular carcinoma, with risk potentially increasing with the extreme ages achievable by some species. Tortoises that may live for many decades in captivity have the opportunity to develop tumors that would be uncommon in shorter-lived species. Box turtles and other chelonians kept long-term in captivity are represented in reports of liver tumors. Monitor lizards and other large lizards that reach substantial ages develop hepatic neoplasia. Iguanas and other commonly kept lizard species are also diagnosed with liver cancer.

Age is a significant risk factor for hepatocellular carcinoma across all reptile species. Geriatric reptiles show higher rates of neoplasia in general, and liver tumors specifically increase with age. The slow tumor growth rates in reptiles mean that tumors may develop over extended periods before becoming clinically apparent. Reptiles with pre-existing liver disease, particularly chronic conditions such as hepatic lipidosis, may be at increased risk for developing liver cancer, though direct causal relationships are not established. Species that commonly develop obesity or hepatic lipidosis in captivity might theoretically have increased liver cancer risk, though this requires further study. Understanding that any reptile species can develop hepatocellular carcinoma helps ensure appropriate monitoring for all captive reptiles, particularly those reaching advanced ages.

Hepatocellular carcinoma in reptiles is related to and must be differentiated from several other liver conditions and tumor types. Hepatic lipidosis, or fatty liver disease, is extremely common in captive reptiles and may predispose to or be confused with liver tumors. Both conditions can cause liver enlargement and elevated liver enzymes. Distinguishing between lipidosis, other liver diseases, and hepatocellular carcinoma typically requires imaging and often biopsy. Hepatic abscesses, which are localized infections within the liver, can present as masses that may initially appear similar to tumors on imaging. Granulomatous liver disease from various causes including mycobacterial infections can also produce mass-like lesions.

Other primary liver tumor types must be distinguished from hepatocellular carcinoma. Cholangiocarcinoma arises from the bile duct epithelium rather than hepatocytes and has different characteristics. Hepatic adenomas are benign tumors that may not require the same aggressive treatment approach. Hemangiosarcoma of the liver, a malignant tumor of blood vessel origin, can occur and carries a particularly poor prognosis. Metastatic tumors from primary cancers in other organs can involve the liver secondary, and distinguishing these from primary liver cancer is important for prognosis and treatment planning. Various soft tissue sarcomas can also affect the liver.

Secondary complications and concurrent conditions commonly accompany hepatocellular carcinoma. Ascites, or fluid accumulation in the body cavity, frequently develops with advanced liver disease or tumors. Coagulopathy from reduced clotting factor production by the diseased liver can lead to bleeding complications. Hepatic encephalopathy, with neurological signs resulting from toxin accumulation that the failing liver cannot clear, may develop in advanced cases. Secondary bacterial infections can complicate the disease course. Malnutrition develops as liver function declines and appetite decreases. Other tumor types may develop concurrently in geriatric reptiles prone to neoplasia. Understanding these related conditions helps veterinarians and owners appreciate the complexity of managing reptiles with hepatocellular carcinoma and the need for comprehensive care approaches.