| polymorphous | 1. Having, or assuming, a variety of forms, characters, or styles; as, a polymorphous author. 2. <biology> Having, or occurring in, several distinct forms; opposed to monomorphic. Source: Websters Dictionary (01 Mar 1998) |
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| polymorphous layer | Layer 6 of the cortex cerebri. Synonym: multiform layer, polymorphous layer, spindle-celled layer. (05 Mar 2000) |
| polymorphous perversion | In psychoanalytic theory, a child's variegated sexual activity and interests, in general, the manifold perversion's shown by an adult. (05 Mar 2000) |
| acinic cell adenocarcinoma | <tumour> An adenocarcinoma arising from secreting cells of a racemose gland, particularly the salivary glands. Synonym: acinar carcinoma, acinic cell carcinoma, acinose carcinoma, acinous carcinoma. (05 Mar 2000) |
| adenocarcinoma | <oncology, tumour> A form of cancer that involves cells from the lining of the walls of many different organs of the body. Breast cancer is a type of adenocarcinoma. (14 May 1997) |
| adenocarcinoma, bronchiolo-alveolar | A carcinoma thought to be derived from epithelium of terminal bronchioles, in which the neoplastic tissue extends along the alveolar walls and grows in small masses within the alveoli. Involvement may be uniformly diffuse and massive, or nodular, or lobular. The neoplastic cells are cuboidal or columnar and form papillary structures. Mucin may be demonstrated in some of the cells and in the material in the alveoli, which also includes denuded cells. Metastases in regional lymph nodes, and in even more distant sites, are known to occur, but are infrequent. (12 Dec 1998) |
| adenocarcinoma, clear cell | An adenocarcinoma characterised by the presence of varying combinations of clear and hobnail-shaped tumour cells. There are three predominant patterns described as tubulocystic, solid, and papillary. These tumours, usually located in the female reproductive organs, have been seen more frequently in young women since 1970 as a result of the association with intrauterine exposure to diethylstilbestrol. (12 Dec 1998) |
| adenocarcinoma, follicular | An adenocarcinoma of the thyroid gland, in which the cells are arranged in the form of follicles. (12 Dec 1998) |
| adenocarcinoma in Barrett's oesophagus | An adenocarcinoma arising in the lower third of the oesophagus that has become columnar cell lined (Barrett's mucosa) due to gastroesophageal reflux. (05 Mar 2000) |
| adenocarcinoma in situ | A noninvasive abnormal proliferation of glands believed to precede the appearance of invasive adenocarcinoma; reported in the endometrium, large intestine, cervix, and other sites. (05 Mar 2000) |
| adenocarcinoma, mucinous | An adenocarcinoma producing mucin in significant amounts. (12 Dec 1998) |
| adenocarcinoma, papillary | An adenocarcinoma containing finger-like processes of vascular connective tissue covered by neoplastic epithelium, projecting into cysts or the cavity of glands or follicles. It occurs most frequently in the ovary and thyroid gland. (12 Dec 1998) |
| adenocarcinoma, scirrhous | An adenocarcinoma with a hard (greek skirrhos, hard) structure owing to the formation of dense connective tissue in the stroma. (12 Dec 1998) |
| adenocarcinoma, sebaceous | A malignant tumour composed of cells showing differentiation toward sebaceous epithelium. The tumour is solitary, firm, somewhat raised, more or less translucent, and covered with normal or slightly verrucose epidermis. It may be yellow or orange. The face and scalp are the commonest sites. The growth can be slow or rapid but metastasis is uncommon. Surgery cures most of the cases. (12 Dec 1998) |
| alveolar adenocarcinoma | <tumour> Adenocarcinoma of the lung in which tumour cells form structures resembling alveoli. (05 Mar 2000) |