From Big Medical Encyclopedia

ABUSIVELY EPITHELIAL NESTS (A. Brunn, is mute. the anatomist, 1849 — 1895) — accumulations of cells of a transitional epithelium in mucous own membrane of a renal pelvis, ureters and a bladder. Result from proliferation of basal cells and their submersible growth. Also B the fleece are for the first time in detail studied by Limbek (Limbeck, 1887) (1893). The last showed that between B. e. and an epithelial vystilka of mucous membranes there is a direct connection in the form of thin cellular tyazhy.

Frequency of detection of B. e. increases with age. So, in a mucous membrane of a renal pelvis they are found: aged up to 15 years in 31% of cases, from 16 to 50 years — in 47%, after 50 years — in 57%. Due to the frequent finding of B. e., especially in the field of a lyetodov of a triangle of a bladder, even at newborns many authors consider B. e. as the normal, though not constantly found educations. However most of researchers considers B.'s presence e. outside a triangle of a bladder the pathological phenomenon connected with hron, inflammatory process in urinary tract. As a result of a degeneration of cells in the central sites B. e. or secretions of slime formation in them of gleams, pieces of iron and even cysts (a glandulyarny and cystous pyelitis, an urethritis, cystitis) is possible, and as a result of a malignancy mucous cancer develops.

See also Bladder , Ureter .

Bibliography: The multivolume guide to pathological anatomy, under the editorship of A. I. Strukov, t. 7, page 267, etc., M., 1964; P y-t of e of l A. Ya. Tumors of a bladder: and their treatment, page 31'tashkent, 1972; And 1 b and-ran of J. Les tumeurs de la vessie, P., 1891; Brunn A. Uber driisenahnliche Bildungen in der Schleimhaut des Nierenbeckens, des Ureters und der Harnblase beim Menschen, Arch. mikr. Anat., Bd 41, S. 294, 1893.

F. L. Leytes.