Biomaterial Database

Epidermal cyst attached to the chorda tympani nerve. 1988

R Youngs, and P Kwok, and M Hawke

Ear Pathology Research Laboratory University of Toronto, Ontario, Canada.

The incidental post-mortem finding of a small epidermal cyst in the middle ear of a 78-year-old female is presented. The epidermal cyst was attached to the chorda tympani nerve adjacent to the body of the incus, but was not associated with bony erosion or any other suggestion of enlargement or invasive growth. The pathological relationship of this lesion to previously reported "congenital cholesteatomas" of the middle ear is discussed.

UI	MeSH Term	Description	Entries
D002781	Cholesteatoma	A non-neoplastic mass of keratin-producing squamous EPITHELIUM, frequently occurring in the MENINGES; bones of the skull, and most commonly in the MIDDLE EAR and MASTOID region. Cholesteatoma can be congenital or acquired. Cholesteatoma is not a tumor nor is it associated with high CHOLESTEROL.	Cholesteatomas
D002814	Chorda Tympani Nerve	A branch of the facial (7th cranial) nerve which passes through the middle ear and continues through the petrotympanic fissure. The chorda tympani nerve carries taste sensation from the anterior two-thirds of the tongue and conveys parasympathetic efferents to the salivary glands.	Chorda Tympani Nerves,Nerve, Chorda Tympani,Nerves, Chorda Tympani,Tympani Nerve, Chorda,Tympani Nerves, Chorda
D003389	Cranial Nerve Diseases	Disorders of one or more of the twelve cranial nerves. With the exception of the optic and olfactory nerves, this includes disorders of the brain stem nuclei from which the cranial nerves originate or terminate.	Cranial Neuropathies,Cranial Neuropathies, Multiple,Neuropathies, Cranial,Cranial Nerve Disorders,Cranial Nerve Palsies,Nervus Cranialis Disorders,Cranial Nerve Disease,Cranial Nerve Disorder,Cranial Nerve Palsy,Cranial Neuropathy,Cranial Neuropathy, Multiple,Multiple Cranial Neuropathies,Multiple Cranial Neuropathy,Nervus Cranialis Disorder,Neuropathies, Multiple Cranial,Neuropathy, Cranial,Neuropathy, Multiple Cranial,Palsies, Cranial Nerve,Palsy, Cranial Nerve
D004427	Ear Diseases	Pathological processes of the ear, the hearing, and the equilibrium system of the body.	Otologic Diseases,Otological Diseases,Disease, Ear,Disease, Otologic,Disease, Otological,Ear Disease,Otologic Disease,Otological Disease
D004432	Ear, Middle	The space and structures directly internal to the TYMPANIC MEMBRANE and external to the inner ear (LABYRINTH). Its major components include the AUDITORY OSSICLES and the EUSTACHIAN TUBE that connects the cavity of middle ear (tympanic cavity) to the upper part of the throat.	Tympanic Cavity,Tympanum,Middle Ear,Cavities, Tympanic,Cavity, Tympanic,Ears, Middle,Middle Ears,Tympanic Cavities,Tympanums
D004814	Epidermal Cyst	Intradermal or subcutaneous saclike structure, the wall of which is stratified epithelium containing keratohyalin granules.	Epidermoid Cyst,Pilar Cyst,Sebaceous Cyst,Cyst, Epidermal,Cyst, Epidermoid,Cyst, Pilar,Cyst, Sebaceous,Cysts, Epidermal,Cysts, Epidermoid,Cysts, Pilar,Cysts, Sebaceous,Epidermal Cysts,Epidermoid Cysts,Pilar Cysts,Sebaceous Cysts
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368	Aged	A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available.	Elderly