[Phleboarchitectonics of hemorrhoids].

Complex histological and injection methods, including roentgenovasography and morphometry, in different age group persons in intraoperative and autopsy materials, total of 333 observations (225 cases with hemorroid and 108 control cases) have demonstrated direct relations of rectal arteries and veins with cavernous bodies of the rectum at sites of the selected localization of internal hemorrhoidal nodes (predominantly at the 2d--4th and 8--10th hour divisions on a clock-face). It was shown that insufficiency of locking mechanisms of portacaval and arteriolar-venular anastomoses of rectal cavernous bodies resulting from impeded blood outflow and hypervolemia underlie the structural basis of hemorrhoid pathogenesis.