Manual of pathological anatomy . regular period, and increasein size, becoming firmer in texture. After some blood is evacu-ated from them, or after the determination of blood to the parts hasceased, they collapse, leaving small pendulous flaps of skin, whichultimately disappear if the tumours have been small; but if theyhave been large, these flaps continue conspicuous, and give a pro-jecting and irregular margin to the anus. Having been strangu-lated by the sphincter, or repeatedly engorged with blood, or chroni-cally inflamed, these tumours become more permanent and solid. The permanent sta
Manual of pathological anatomy . regular period, and increasein size, becoming firmer in texture. After some blood is evacu-ated from them, or after the determination of blood to the parts hasceased, they collapse, leaving small pendulous flaps of skin, whichultimately disappear if the tumours have been small; but if theyhave been large, these flaps continue conspicuous, and give a pro-jecting and irregular margin to the anus. Having been strangu-lated by the sphincter, or repeatedly engorged with blood, or chroni-cally inflamed, these tumours become more permanent and solid. The permanent state of the tumours is owing partly to thedevelopment of capillary vessels, and partly to the eftused bloodand lymph becoming organized; this latter circumstance especiallygiving rise to the excrescences, or irregular mass of tumours foundaround the anus in those subject to hoemorrhoids. The secondvariety of hsemorrhoidal tumours includes such as are formed by apure dilatation, or varicose state of the veins of the part. Dr. Cop-. HEMORRHOIDS. 609 land, from whom we continue to quote, describes them as not sodisposed to enlarge at particular periods, and as more permanentand less painful than the first variety. They are commonly of adark or bluish colour, and soft and elastic to the touch, They areeasily emptied by compression, but quickly fill again. * They areround and broad at the base, and often distributed in irregular orill-defined clusters, which extend often for some way up the rec-tum, sometimes even as far as the colon. M. Begin observes* that, in most cases, the dilated, superficial, submucous, or sub-cutaneous veins are only the smallerpart of those surrounding the rectum. ^i^, 138. Sometimes the lower part of this in-testine appears as if plunged in themiddle of a network of dilated andengorged veins, forming a thick vas-cular ring, the incision or punctureof which may give rise to dangerous heemorrhages. x ^?^..^ ^ u ^ 4. a ^ a-T-p • n • n j^ ^ slightly loDulate
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