papilloma (pap-il-o'mah). 1

Any abnormal excrescence having a villous structure. 2. More properly, a tumor of the skin or mucous membrane, either se ile or pedunculated, consisting of hypertrophied or new-formed papillae covered by an envelope of epithelial cells. The epithelium is sometimes spread over the ma of hypertrophied papillae so as to form a smooth tumor, and sometimes it forms a separate envelope to each papilla so as to produce a villous or filiform appearance. See p. corneum and p. mucosum. blastoma to us p. A soft p. of a mucous membrane with a vascular framework of connective ti ue covered with epithelium. inflammatory p. of the skin. A form of p. attended with inflammation and the formation of intra papillary absce es. intra cystic p. A p. developing within single or multiple cysts. A p. showing feathery tufts like chorionic cells. p. corneum, p. durum. A hard or horny p. (e. g., a corn or wart) attended with a marked development of the corneous layer of the epithelial envelope. See p. mucosum. p. molle, p. mucosum. A p. in which the epithelium covers the enlarged or new-formed papillae in a thin layer, with but little development of the stratum corneum. See condyloma a cum in at a, under condyloma, urethral p. The painful urethral caruncle, carnosity, vegetation, fungosity, or polypus" of the older writers, the mucous hypertrophy of A. Guerin, the urethral hemorrhoid of Richet and Dupin and of Hutch in son; a single or multiple, soft, gelatinous or fibro cellular tumor arising from the urethra, villous p. A persistent chorionic villus. [Lat., papilla, a teat, + Gr., oma, tumor.]