. Diseases of the rectum and anus: designed for students and practitioners of medicine. uallyinduced by irritating discharges from the rectum or vagina,although they sometimes appear when there is no evidence ofsuch irritation. Senn has frequently observed the parts studdedwith such tumors, varying from the size of a hemp-seed tothat of a cherry. When located upon the mucous membrane NON-MALIGNANT TUIMORS 489 of the rectum they are covered with cyUndric epitheHiim; whensituated upon the skin of the anal region they are covered withsquaijious epitliehnm. These tumors at times assume largepropor
. Diseases of the rectum and anus: designed for students and practitioners of medicine. uallyinduced by irritating discharges from the rectum or vagina,although they sometimes appear when there is no evidence ofsuch irritation. Senn has frequently observed the parts studdedwith such tumors, varying from the size of a hemp-seed tothat of a cherry. When located upon the mucous membrane NON-MALIGNANT TUIMORS 489 of the rectum they are covered with cyUndric epitheHiim; whensituated upon the skin of the anal region they are covered withsquaijious epitliehnm. These tumors at times assume largeproportions, sometimes causing complete obstruction; theymay be sessile or attached by a narrow or broad are soft and spongy in consistence, tender, bleed fre-quently and profusely from slight causes, and excite the dis-charge of considerable mucus. These papillomatous growths resemble villous tumors ofthe bladder. Dennis says: Such growths spring from thesubmucous connective-tissue layer; the confluent villi con-sist of an axis of fibrous tissue containing blood-vessels, and. Fig. 165.—Pen Sketch Fibromata (Authors Case). are covered by cylindric epithelium. They present also a cer-tain proportion of hypertrophied glandular follicles. Theblood-vessels are relatively large and numerous. Multipledelicate villi may compose the growth, giving its surface asmooth, velvety feel; or secondary knobbed processes maydevelop, producing a caulifiower-like surface. By obstructionto the venous return in the narrowing pedicle edema andcystic degeneration of the tufts may ultimately develop. Clin-ically they occupy a position between adenomata and carci-nomata, and, in cases that have been neglected or in whichsufficiently wide extirpation of sound tissue at their base hasnot been made, the later development of carcinoma is not in-frequent. Van Buren says: After ulceration and destruc- 490 DISEASES OF THE RECTUM AND ANUS tion of the mucous membrane, the surface of a vil
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanusdis, bookyear1910
