Ear

Ear canal tumors in cats are masses that occur in the ear canal and can begin in the skin, sweat gland, and muscle tissues of the ear.

Ear canal tumors in dogs are abnormal growths that can arise from any part of the ear canal.

Otitis media and interna refer to inflammation of the middle and inner ear. These terms are often used as synonyms for middle and inner ear infections.

Otitis externa is inflammation of the external ear canal and is often referred to as an ear infection. Ear infections and otitis externa are common in dogs.

Otitis externa is inflammation of the external part of the ear canal. In cats, otitis externa is most commonly caused by ear infections and the terms are often used synonymously.  

Inflammation of the middle and inner ear affect the parts of the ear that are behind the eardrum. In dogs, this form of inflammation is usually caused by bacterial infection, which most often spreads to these structures from the external ear.

The nasopharyngeal tract is a conduit that connects the throat with the nasal cavities and the middle ear. Sometimes pinkish-white masses, known as polyps, grow in the nasopharyngeal tract in dogs. 

Polyps are benign, non cancerous masses which can grow in multiple locations in cats. A common location of polyps in cats is the eustachian tube, which connects the middle ear with the nasal cavity.

Ear mites (Otodectes cynotis) are a contagious parasite that live in the ears of their hosts. This parasite resembles a small tick, but is much smaller; too small to distinguish with the naked eye.

Deafness in dogs refers to the partial or total loss of hearing in one or both ears. Deafness can occur from a variety of reasons such as heredity, birth defects, infection, trauma, blocked ear canal, or old age. Deafness in dogs is actually quite common.

Ear mites are a common parasite found in the ear canal of cats. These microscopic creatures live on the surface of the skin, feeding on skin oil and ear wax.