Ear Polyps and Growths in Dogs: When Ear Infections Keep Returning

By Emiel Maddens  ·  Reviewed in consultation with licensed veterinary professionals  ·  Updated April 2026  ·  11 min read

Photo by Tima Miroshnichenko on Pexels

Ear infections are one of the most common reasons dog owners visit the veterinarian, and most cases respond well to appropriate topical and systemic treatment. But when ear infections keep coming back, when they seem to clear up only to return weeks later, or when one ear is chronically affected despite proper medication, something deeper may be going on. One of the most underrecognized causes of recurrent ear infections in dogs is the presence of polyps or growths within the ear canal. These masses obstruct normal drainage, trap wax and debris, create pockets where bacteria and yeast thrive, and make it physically impossible for medications to reach all surfaces of the ear canal.

For many dog owners, the discovery of an ear canal polyp or tumor comes as a surprise. They may have been treating ear infections for months or even years before advanced diagnostics reveal the underlying cause. This delay is common because ear canal masses often cannot be seen without specialized equipment, and standard ear infection treatments may temporarily improve symptoms even when a growth is present. Understanding the types of ear canal growths, their symptoms, and when to suspect them can help owners and veterinarians break the cycle of recurrent ear disease and pursue definitive treatment sooner. This guide covers the most important ear canal polyps and growths in dogs, from benign inflammatory polyps to potentially malignant tumors.

What Are Ear Polyps and Growths in Dogs?

Ear polyps and growths refer to abnormal tissue masses that develop within the ear canal or on the ear pinna. They range from inflammatory non-neoplastic polyps to benign and malignant tumors, and they share a common clinical consequence of disrupting normal ear canal function.

Inflammatory polyps are non-cancerous, pedunculated (stalk-based) tissue masses that arise from the mucosal lining of the ear canal or middle ear

While more common in cats, they do occur in dogs, particularly in association with chronic otitis media (middle ear infection). These polyps are composed of inflamed connective tissue covered by epithelium and can grow large enough to fill and obstruct the ear canal. They perpetuate infection by blocking drainage, trapping secretions, and creating an anaerobic environment favorable to bacterial growth.

Ceruminous gland adenomas are benign tumors arising from the ceruminous (wax-producing) glands that line the ear canal

They are the most common type of ear canal tumor in dogs. These masses typically appear as smooth, rounded, pink to dark blue or brown nodules within the ear canal. While they are non-malignant, they can grow to obstruct the canal, cause discomfort, and predispose to chronic infection. Ceruminous gland adenomas are most commonly seen in middle-aged to older dogs.

Ceruminous gland adenocarcinomas are the malignant counterpart of ceruminous gland adenomas

These tumors are locally invasive, meaning they can grow into the surrounding bone and tissue of the ear canal and skull. They may also metastasize (spread) to regional lymph nodes or distant organs, although metastasis is less common than local invasion. Clinically, they may be difficult to distinguish from benign adenomas without histopathological examination of a biopsy sample.

Other ear canal growths include papillomas (wart-like growths), sebaceous gland tumors, squamous cell carcinomas, and melanomas

While less common than ceruminous gland tumors, these masses can also cause chronic ear disease and require appropriate diagnosis and treatment. Any mass identified within the ear canal should be biopsied to determine its nature and guide treatment decisions.

Chronic ear infections that repeatedly return despite proper treatment should raise suspicion for underlying polyps or growths within the ear canal.

Photo by Tima Miroshnichenko on Pexels

What Causes Ear Polyps and Growths in Dogs?

The development of ear canal polyps and growths is closely linked to chronic ear disease. Long-standing inflammation appears to promote abnormal tissue growth, creating a vicious cycle where the growth itself worsens the infection, which in turn drives further tissue changes. Breaking this cycle often requires surgical intervention.

1. Factor

Chronic inflammation from long-standing ear infections stimulating abnormal tissue growth and polyp formation within the ear canal

2. Factor

Neoplastic transformation of ceruminous gland cells producing benign adenomas or malignant adenocarcinomas

3. Factor

Chronic otitis media (middle ear infection) serving as a source of inflammatory polyps that extend into the external ear canal

4. Factor

Age-related changes in ear canal glandular tissue increasing tumor susceptibility in older dogs

5. Factor

Chronic ear canal stenosis (narrowing) and hyperplasia that progresses to mass-like tissue proliferation

6. Factor

Genetic predisposition in certain breeds to ear canal tumors and chronic proliferative ear disease

Which Breeds Are Most Affected?

Breeds with long, pendulous ears, narrow ear canals, or a genetic predisposition to allergic ear disease are at the highest risk for developing ear canal growths. These breeds benefit from proactive ear health management and regular veterinary ear examinations.

• Cocker Spaniels (American and English) are the breed most commonly affected by ceruminous gland tumors due to their pendulous ears, narrow ear canals, and tendency toward chronic otitis: Cocker Spaniels (American and English) are the breed most commonly affected by ceruminous gland tumors due to their pendulous ears, narrow ear canals, and tendency toward chronic otitis
• Labrador Retrievers develop chronic ear infections at high rates, predisposing them to secondary inflammatory changes and potential polyp formation: Labrador Retrievers develop chronic ear infections at high rates, predisposing them to secondary inflammatory changes and potential polyp formation
• Springer Spaniels share the ear conformation and chronic otitis risk of other spaniel breeds, with increased ceruminous gland tumor incidence: Springer Spaniels share the ear conformation and chronic otitis risk of other spaniel breeds, with increased ceruminous gland tumor incidence
• German Shepherds can develop chronic proliferative ear disease and are among the breeds reported with higher ear canal tumor rates: German Shepherds can develop chronic proliferative ear disease and are among the breeds reported with higher ear canal tumor rates
• Shar-Peis have uniquely narrow ear canals that predispose to chronic infection, canal stenosis, and secondary tissue proliferation: Shar-Peis have uniquely narrow ear canals that predispose to chronic infection, canal stenosis, and secondary tissue proliferation
• Golden Retrievers frequently develop allergic ear disease that, when chronic and poorly controlled, can contribute to ear canal tissue changes: Golden Retrievers frequently develop allergic ear disease that, when chronic and poorly controlled, can contribute to ear canal tissue changes

Signs and Symptoms

The symptoms of ear canal polyps and growths overlap significantly with those of standard ear infections, which is why these conditions are often missed initially. The key distinguishing feature is the recurrent or refractory nature of the ear disease. An ear infection that keeps coming back or that responds only partially to treatment should always raise suspicion for an underlying structural cause.

Ear infections that recur repeatedly despite appro

Ear infections that recur repeatedly despite appropriate treatment and good owner compliance with medications

Chronic ear discharge (purulent, waxy, or bloody)

Chronic ear discharge (purulent, waxy, or bloody) that does not fully resolve with standard therapy

Head shaking, ear scratching, or tilting of the he

Head shaking, ear scratching, or tilting of the head toward the affected ear

A visible mass or swelling within the ear canal or

A visible mass or swelling within the ear canal or protruding from the ear opening

Hearing loss or decreased responsiveness to sounds

Hearing loss or decreased responsiveness to sounds, particularly if the growth obstructs the ear canal significantly

Pain when the ear is touched, handled, or examined

Pain when the ear is touched, handled, or examined, sometimes with vocalization

Foul odor from the affected ear despite regular cl

Foul odor from the affected ear despite regular cleaning and treatment

Diagnosis

Diagnosing ear canal polyps and growths requires visualization of the ear canal beyond what standard otoscopic examination can provide. Video otoscopy and advanced imaging are invaluable tools for identifying masses, determining their extent, and planning appropriate surgical intervention.

Method

Video otoscopy providing magnified, well-lit visualization of the entire ear canal to identify masses, polyps, and structural changes not visible on standard examination

Method

CT scan or MRI imaging of the ear to assess the extent of disease, involvement of the middle ear or bulla, and to plan surgical approach

Method

Cytology of ear canal discharge to characterize the type of infection present alongside the growth

Method

Incisional or excisional biopsy with histopathological examination to definitively determine whether a growth is inflammatory, benign neoplastic, or malignant

Method

Complete blood work and regional lymph node evaluation to assess overall health and screen for metastatic disease in suspected malignant tumors

Treatment

Treatment of ear canal polyps and growths is predominantly surgical. Medical management alone does not eliminate these masses, and chronic infections will continue to recur as long as the growth remains. Early surgical intervention typically leads to better outcomes and less extensive surgery than delayed treatment of advanced disease.

Treatment

Surgical excision of ear canal polyps, typically through the ear canal opening (lateral ear canal resection) or through a ventral bulla osteotomy for polyps originating in the middle ear

Treatment

Surgical removal of ceruminous gland tumors, with the extent of surgery depending on the tumor's size, location, and whether it is benign or malignant

Treatment

Total ear canal ablation (TECA) combined with bulla osteotomy for advanced cases where the ear canal is severely diseased, narrowed, or contains an invasive tumor

Treatment

Histopathological examination (biopsy) of all removed tissue to confirm the diagnosis and determine whether the growth is benign or malignant

Treatment

Post-operative medical management including systemic antibiotics, ear medications, and pain control during the healing period

Treatment

Radiation therapy for malignant ear canal tumors that cannot be completely excised surgically, or as adjunctive treatment after surgery

Prevention

While not all ear canal growths can be prevented, reducing chronic ear inflammation through proper ear care, allergy management, and thorough infection treatment can lower the risk of inflammation-driven tissue changes. Early detection through regular veterinary ear examinations gives the best chance for successful treatment.

Tip

Treat ear infections thoroughly and completely, following your veterinarian's full course of medication to prevent chronic inflammation that promotes tissue overgrowth

Tip

Schedule regular ear examinations, especially for breeds predisposed to chronic ear disease, to detect early canal changes

Tip

Maintain consistent ear cleaning routines using veterinarian-recommended solutions to keep the ear canal environment healthy

Tip

Address underlying allergies that contribute to chronic ear inflammation, as uncontrolled allergies are a major driver of recurrent otitis

Tip

Do not ignore a recurring ear infection, seek advanced diagnostics including otoscopy or imaging if infections return despite proper treatment

Related Symptoms

Dogs with this condition often show these symptoms. Our guides explain each one:

• Chronic ear infections in dogs, Learn more on Vetified
• Dog eyelid skin problems, Learn more on Vetified
• Allergic dermatitis and ear disease, Learn more on Vetified

Frequently Asked Questions

Q: q

a

Q: q

a

Q: q

a

Q: q

a

Sources

Moisan, P.G. & Watson, G.L. (1996). Ceruminous gland tumors in dogs and cats: a review of 124 cases. Journal of the American Animal Hospital Association, 32(5), 448-452.

London, C.A., Dubilzeig, R.R., Vail, D.M., Ogilvie, G.K., Hahn, K.A., Brewer, W.G., & Hammer, A.S. (1996). Evaluation of dogs and cats with tumors of the ear canal: 145 cases (1978-1992). Journal of the American Veterinary Medical Association, 208(9), 1413-1418.

Gotthelf, L.N. (2004). Small Animal Ear Diseases: An Illustrated Guide, 2nd Edition. Elsevier.

Miller, W.H., Griffin, C.E., & Campbell, K.L. (2013). Muller and Kirk's Small Animal Dermatology, 7th Edition. Elsevier.

Related Reading

• Dog Eyelid Skin Problems, Related guide on Vetified
• Dog Lip Fold Dermatitis, Related guide on Vetified
• Dog Chronic Ear Infections, Related guide on Vetified
• Dog Allergic Dermatitis, Related guide on Vetified

Emiel Maddens

Founder of Vetified. Develops topical antifungal and antimicrobial formulations for companion animals. Vetified products are listed on DailyMed and manufactured through FDA-registered facilities in the United States.