Ear polyps, also known as nasopharyngeal polyps or inflammatory polyps, are benign growths that arise from the lining of the middle ear or eustachian tube in cats. These fleshy, non-cancerous masses grow on a stalk and can extend in various directions depending on their origin point, either pushing outward into the external ear canal, downward into the back of the throat (nasopharynx), or both. Nasopharyngeal polyps represent one of the most common causes of chronic ear and upper respiratory symptoms in young cats, with the majority of affected animals being under two years of age. While cats of any age can develop polyps, the strong predilection for young animals suggests developmental or early-life factors play important roles in their formation.
The exact cause of feline inflammatory polyps remains incompletely understood, though several theories have been proposed. Chronic inflammation of the middle ear lining, possibly triggered by upper respiratory infections early in life, is widely considered a primary contributing factor. Some researchers hypothesize that certain cats may have congenital abnormalities of the eustachian tube or middle ear that predispose to polyp formation. The inflammatory nature of these growths, composed of fibrovascular tissue covered by respiratory epithelium, supports the theory that they represent an exaggerated tissue response to chronic irritation or infection. Regardless of their origin, polyps grow progressively and cause symptoms through physical obstruction and secondary inflammation.
The impact of ear polyps on affected cats varies depending on the size and location of the growth. Polyps extending into the ear canal cause symptoms similar to chronic ear infections, including discharge, head shaking, and discomfort. Those growing into the nasopharynx can obstruct the airway, causing breathing difficulties, snoring, and voice changes. Large polyps affecting both areas produce a combination of ear and respiratory symptoms that significantly impact quality of life. Secondary bacterial infections commonly complicate polyps, adding to the cat's discomfort. Without treatment, polyps continue to grow and symptoms progressively worsen, though the masses themselves remain benign and do not spread to other locations.
Treatment for ear polyps is surgical and carries a good prognosis when performed appropriately. Simple traction removal involves grasping the polyp and removing it along with its stalk, offering a relatively straightforward procedure with moderate success rates. More extensive surgery, including ventral bulla osteotomy to access the middle ear, provides better outcomes with lower recurrence rates. Early diagnosis before polyps become large and firmly attached improves treatment success. The prognosis for cats with ear polyps is generally favorable, with most cats returning to normal following successful surgical removal. Veterinary evaluation of any cat with chronic ear problems or unexplained respiratory symptoms is essential for timely diagnosis and treatment.
