| Malherbe's calcifying epithelioma | A tumour composed of cells resembling those of the hair matrix, which undergo 'mummification' and may calcify. It is a relatively uncommon tumour, which may occur at any age from infancy. The majority of patients are under 20, and females are affected more than males. The lesion is usually a solitary deep dermal or subcutaneous tumour 3-30 mm in diameter, situated in the head, neck, or upper extremity. (12 Dec 1998) |
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| calcifying and keratinizing odontogenic cyst | A mixed radiolucent-radiopaque lesion of the jaws with features of both a cyst and a solid neoplasm; characterised microscopically by an epithelial lining showing a palisaded layer of columnar basal cells, presence of ghost cell keratinization, dentinoid, and calcification. Synonym: calcifying and keratinizing odontogenic cyst, Gorlin cyst. (05 Mar 2000) |
| calcifying epithelial odontogenic tumour | A benign epithelial odontogenic neoplasm derived from the stratum intermedium of the enamel organ; a painless, slowly growing, mixed radiolucent-radiopaque lesion characterised histologically by cords of polyhedral epithelial cells, deposits of amyloid, and spherical calcifications. Synonym: Pindborg tumour. (05 Mar 2000) |
| calcifying odontogenic cyst | A mixed radiolucent-radiopaque lesion of the jaws with features of both a cyst and a solid neoplasm; characterised microscopically by an epithelial lining showing a palisaded layer of columnar basal cells, presence of ghost cell keratinization, dentinoid, and calcification. Synonym: calcifying and keratinizing odontogenic cyst, Gorlin cyst. (05 Mar 2000) |
| odontogenic cyst, calcifying | A mixed radiolucent-radiopaque lesion of the jaws with features of both a cyst and a solid neoplasm. It is characterised microscopically by an epithelial lining showing a palisaded layer of columnar basal cells, presence of ghost cell keratinization, dentinoid, and calcification. (12 Dec 1998) |
| basal cell epithelioma | <oncology, tumour> The most common form of skin cancer. A malignant growth of epidermal tissue, specifically basal cells. most common in the fair-skinned on sun-exposed areas (especially the face). (15 Nov 1997) |
| Borst-Jadassohn type intraepidermal epithelioma | <tumour> Precancerous lesions clinically suggestive of actinic or seborrheic keratosis, with nests of immature or abnormal keratinocytes within the epidermis. (05 Mar 2000) |
| malignant ciliary epithelioma | <tumour> Malignant hyperplasia of ciliary epithelium with frequent involvement of the pigmented layer. Synonym: adult medulloepithelioma. (05 Mar 2000) |
| chorionic epithelioma | An obsolete term for choriocarcinoma. (05 Mar 2000) |
| multiple self-healing squamous epithelioma | <tumour> Multiple skin tumours, most frequently on the head, each resembling a well-differentiated squamous carcinoma or keratoacanthoma; individual tumours resolve spontaneously after several months, leaving deep-pitted scars with irregular crenellated borders, and are usually replaced by additional new tumours; autosomal dominant inheritance. (05 Mar 2000) |
| sebaceous epithelioma | <tumour> A benign tumour of the sebaceous gland epithelium in which small basaloid or germinative cells predominate. (05 Mar 2000) |
| epithelioma | <oncology, tumour> A neoplasm of epithelial origin, ranging from benign (adenoma and papilloma) to malignant (carcinoma). (14 May 1997) |
| epithelioma adenoides cysticum | <tumour> Multiple small benign nodules, occurring mostly on the skin of the face, derived from basal cells of hair follicles enclosing small keratin cysts; frequent autosomal dominant inheritance. Synonym: acanthoma adenoides cysticum, Brooke's tumour, epithelioma adenoides cysticum, hereditary multiple trichoepithelioma. Origin: tricho-+ epithelioma (05 Mar 2000) |
| epithelioma contagiosum | A poxvirus infection of poultry and other birds characterised by the formation of wart-like nodules on the skin and diphtheritic necrotic masses (cankers) in the upper digestive and respiratory tracts. (12 Dec 1998) |
| epithelioma cuniculatum | Verrucous carcinoma occurring uncommonly on the sole of the foot, forming a slowly growing warty mass that may invade deeply but which rarely metastasizes. (05 Mar 2000) |