- epithelioma
- 1. An epithelial neoplasm or hamartoma of the skin, especially of skin appendage origin. 2. Obsolete term for a carcinoma of the skin derived from squamous, basal, or adnexal cells. [epithelium + G. -oma, tumor]- e. adenoides cysticum SYN: trichoepithelioma.- Borst-Jadassohn type intraepidermal e. precancerous lesions clinically suggestive of actinic or seborrheic keratosis, with nests of immature or abnormal keratinocytes within the epidermis.- e. 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.- Malherbe calcifying e. SYN: pilomatrixoma.- malignant ciliary e. malignant hyperplasia of ciliary epithelium with frequent involvement of the pigmented layer. SYN: adult medulloepithelioma.- multiple self-healing squamous e. [MIM*132800] multiple skin tumors, most frequently on the head, each resembling a well-differentiated squamous carcinoma or keratoacanthoma; individual tumors resolve spontaneously after several months, leaving deep-pitted scars with irregular crenellated borders, and are usually replaced by additional new tumors; autosomal dominant inheritance.- sebaceous e. a benign tumor of the sebaceous gland epithelium in which small basaloid or germinative cells predominate.
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ep·i·the·li·o·ma -.thē-lē-'ō-mə n, pl -mas also -ma·ta -mət-ə a benign or malignant tumor derived from epithelial tissueep·i·the·li·o·ma·tous -mət-əs adj* * *
n.a tumour of epithelium, the covering of internal and external surfaces of the body: a former name for carcinoma.* * *
ep·i·the·li·o·ma (ep″ĭ-the″le-oґmə) [epithelio- + -oma] 1. a neoplasm of epithelial origin; these range from benign (adenomas and papillomas) to malignant (carcinomas). 2. sometimes used loosely and incorrectly as a synonym for carcinoma.
Medical dictionary. 2011.
