| 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) |
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| 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) |
| 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) |
| 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) |
| basal cell | <pathology> General term for relatively undifferentiated cells in an epithelial sheet that give rise to more specialised cells act as stem cells). In the stratified squamous epithelium of mammalian skin the basal cells of the epidermis (stratum basale) give rise by an unequal division to another basal cell and to cells that progress through the spinous, granular and horny layers, becoming progressively more keratinised, the outermost being shed as squames. In olfactory mucosa the basal cells give rise to olfactory and sustentacular cells. In the epithelium of epididymis their function is unclear, but they probably serve as stem cells. (13 Nov 1997) |
| basal cell adenoma | <tumour> A benign tumour of major or minor salivary glands or other organs composed of small cells showing peripheral palisading. (05 Mar 2000) |
| basal cell carcinoma | <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) |
| basal cell hyperplasia | Increase in the number of cells in an epithelium resembling the basal cells. (05 Mar 2000) |