Ear Canal Polyps in Dogs and Cats: A Lump-Like Mass is Palpable

Skin & CoatQ&AMeongsiljang Veterinary Advisory Board

Ear canal polyps are benign growths that develop in the external or middle ear and can lead to recurrence and chronic otitis media. Early detection and surgical removal are key.

What Exactly Are Ear Canal Polyps?

Illustration of a cross-section of a polyp inside a dog's external ear canal

Ear canal polyps are mostly non-cancerous growths that develop from the lining of the middle ear or the eustachian tube (the passage connecting the ear, nose, and throat) and extend into the external ear canal. Although they are benign, they should not be left untreated. Polyps can block the ear canal, leading to chronic middle and outer ear infections. If the inflammation irritates nearby nerves, it can cause facial paralysis or balance issues, such as head tilting or stumbling. If your pet has a persistent odor or discharge from one ear, suspect a polyp or other mass and consult your veterinarian for an otoscopic exam and imaging tests like CT or MRI.

What Causes Them? Understanding the Etiology

The exact cause of ear polyps remains unclear. In cats, they are often found at a young age, suggesting a possible congenital component, and the role of middle ear inflammation in polyp formation is still uncertain. Ear polyps are relatively well-documented in cats but rarely reported in dogs. While chronic otitis externa, bacterial infections, ear mites, allergic predisposition, floppy ears, and excessive ear hair are not definitively proven to directly cause polyps, these factors impair ear ventilation and create conditions conducive to inflammation. As they can worsen ear health, it’s important to manage these risk factors proactively.

Suspect Polyps If You Notice These Symptoms

Polyps often grow in hard-to-see areas, making them difficult for pet owners to spot directly. However, if you notice the following symptoms occurring together, it’s important to consider the possibility of polyps:

Favoring one ear: Your pet excessively scratches or rubs only one ear against the floor.

Head tilting: Their head is tilted or turned to one side more than usual.

Foul odor and discharge: Brown or black discharge keeps recurring.

Hearing loss: They respond more slowly when you call their name.

Balance issues: They stumble while walking or spin in circles.

A puppy that repeatedly scratches one ear

When to Seek Immediate Veterinary Care

If your pet’s head tilts severely to one side (torticollis), their eyes exhibit rhythmic shaking (nystagmus), or one side of their face appears droopy as if paralyzed, the polyp has likely invaded the middle and inner ear. In such cases, seek veterinary care within 24 hours. Delaying treatment may result in permanent loss of balance.

How Are They Diagnosed at the Clinic?

The veterinarian first uses an otoscope to directly examine the inside of the external ear canal. If there is excessive earwax or discharge, the ear is cleaned before inspection; if any masses are visible, their size, location, and shape are assessed. Polyps in the external ear canal can often be identified with an otoscope while the patient is awake. However, to accurately determine whether the condition has extended to the middle ear or nasopharynx and to define the full extent of the lesion, advanced imaging such as CT or MRI may be necessary. While skull radiographs can serve as an adjunct, they have limitations in visualizing the fine structures beyond the tympanic membrane, making CT superior for providing detailed information on upper airway and middle ear lesions. Since polyps in cats frequently grow toward the nasopharynx, an oral examination above the soft palate is also performed under sedation.

Differences Between Ear Canal Polyps in Dogs vs. Cats

Item	Dog	Cat
Main Cause	Polyps themselves are rare; may accompany chronic otitis externa, etc.	Non-neoplastic polyps (mostly at a young age, possible congenital factors)
Location	Rarely reported in the external ear canal	Originates in the middle ear · auditory tube and extends to the external ear canal · nasopharynx
Main Age	No clear predisposed age (rare)	Mainly young age (mostly under 7 years, average about 3 years)
Recurrence Tendency	Depends on whether underlying otitis externa is controlled	Complete removal is difficult, so recurrence may occur
Treatment Priority	Control underlying inflammation + removal	Traction removal or complete surgical removal

Based on veterinary textbooks; individual variation exists

Surgery is the Primary Treatment

Ear canal polyps cannot be completely eliminated with medication alone; surgical removal is the primary treatment. The specific approach depends on the polyp’s location and size.

Polip traction (pull-out) technique: This involves grasping the polyp in the external ear canal and pulling it out by the root. While relatively simple, recurrence is possible if any root tissue remains.

Lateral ear canal resection (vertical canal ablation): When chronic otitis externa coexists with polyps, the external ear canal is opened or removed to eliminate the affected tissue.

Ventral bulla osteotomy: If the infection has spread to the middle ear, this surgery accesses the tympanic bulla through a ventral approach under the jaw to completely remove the polyp.

If traction alone is insufficient or the middle ear is involved, lateral ear canal resection or ventral bulla osteotomy is necessary. Even after surgery, recurrence is likely if underlying inflammation is not properly controlled, making long-term ear care essential.

A veterinarian examining the inside of a dog's ear using an otoscope

Key to Preventing Recurrence After Surgery

Even if a lump is surgically removed, recurrence is possible if the underlying cause isn’t addressed. Effective management requires a comprehensive approach, including allergy control, adjusting ear-cleaning frequency, eliminating food allergens, and treating chronic bacterial or yeast infections. In cats, simple traction often fails to fully remove the root of the issue, leaving it behind and increasing the risk of recurrence; therefore, consistent follow-up monitoring is essential. Please schedule regular otoscopic examinations for a specified period after surgery to check for any signs of recurrence.

How to Manage Care at Home

For the first two weeks after surgery, it’s best to avoid touching the area around the ears. Keep the e-collar on to prevent scratching, and administer the prescribed ear drops and antibiotics at the exact intervals recommended by your veterinarian. Wait at least two weeks before bathing your pet, and even then, make sure to plug the ears with cotton to keep water out. For routine care, gently clean the ears once or twice a week with a specialized ear cleaner, and avoid inserting cotton swabs deep into the ear canal. If your pet has underlying otitis externa, you may find our guide on Ear Care and Otitis Externa Prevention helpful.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Are ear polyps cancerous?

No, ear polyps are not tumors but rather benign, proliferative growths. However, since some masses that develop in the ears of middle-aged and senior dogs can be malignant (such as ear canal adenocarcinoma or squamous cell carcinoma), it is essential to confirm the exact type through a histopathological examination after removal for safety.

Is it okay to just leave a small polyp alone?

I don't recommend it. Even if there are no symptoms right now, if the polyp blocks the Eustachian tube, it can prevent proper drainage of secretions, leading to secondary infections and otitis media. Removing it before neurological symptoms develop leads to a much better prognosis.

What is the likelihood of the condition recurring after surgery?

Dogs generally have a favorable prognosis when underlying otitis externa is well managed, whereas in cats, traction alone often leaves the root behind, making complete removal difficult and leading to reported recurrences. The extent of recurrence varies depending on the removal method and the siz

Can't it be treated with medication instead of surgery?

Medications alone cannot completely eliminate polyps. According to standard veterinary practice, surgical removal is the primary treatment, with options including traction extraction, lateral ear canal ablation, or ventural bulla osteotomy. Medications play a supportive role by reducing inflammation and pain before and after surgery, helping to prevent the development of ear pain-related fear.

Which breeds are more prone to ear polyps?

Rather than being linked to specific breeds, the risk factors are structural: floppy ears or excessive hair in the ear canal can impair ventilation, and frequent exposure to swimming or humid environments can lead to moisture buildup, predisposing pets to recurrent otitis externa. In cats, this condition tends to occur at a younger age rather than being breed-specific.