. Diseases of the rectum and anus: designed for students and practitioners of medicine. tructionto 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 villous tu
. Diseases of the rectum and anus: designed for students and practitioners of medicine. tructionto 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 villous tumorwill be found to consist of embryonal cells, or granulation tis-sue. If a malignant character is present, its evidences will befound at the base of the tumor, where there is still mucousmembrane, and in the behavior of its epithelium. Allinghamformerly believed that villous tumors did not become malig-nant, but more recently he reports having seen eighteen casesin three of which the growths were replaced by author has frequently seen polypoid-like vegetations which. Fig. 166.—Embryonic Tissue Removed from Dermoid Cyst of theSacrum (Leitz, 3; Ocular, IV). originated from various causes, but he has never seen onewhich he would consider a typic villous tumor. Angioma.—A few cases of angioma (nevus) of the rectumhave been reported, but the author has never had an oppor-tunity of observing this condition. In the case reported byBarker post-mortem examination showed that the lower fourand one-half inches ( centimeters) of the rectum were muchthickened by a nevus, cavernous in character, which gave tothe mucous membrane a purple hue. The folds of the mucosa NON-MALIGNANT TUMORS 491 were thickened, and two large, irregular ulcers were promi-nent, which evidently were responsible for the frequent hem-orrhages which preceded death. Angiomata may involve buta small area or may encircle the bowel. They are best treatedby cauterization, and the Paquelin cautery is
Size: 1588px × 1573px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanusdis, bookyear1910
