切除痔核組織内に見られる肛門腺と痔瘻瘻管内に見られる肛門腺の形態とその意義

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  • Histological Features and Significance of Anal Glands Observed in Operated Hemorrhoidal Tissues and Fistulous Tracts

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Histological features and differences of the anal glands between males and females were examined in operated hemorrhoidal tissues (22 males and 20 females) and resected fistulous tracts (30 males and 7 females). A high proportion of anal glands in hemorrhoidal tissues was found to be unbranched and extending caudad in both sexes. In men, the ducts were frequently lined with transitional epithelia associated with columnar cells, but there were no differences in size, depth and position of the anal glands between the men and women. Mucous production ability of the ducts in females was found to be weaker than in males. The majority of the anal ducts in fistulous tracts were lined with columnar epithelia overlying transitional epithelium in men, and with squamous metaplastic epithelia in women. The size of the wall and outside diameter of the ducts in fistulous tracts, which were found to have no differences between males and females, were significantly greater than those in hemorrhoidal tissues. The size of inside diameter of the duct in fistulous tracts in males was significantly greater than in females. It is presumed that the spread of infection through the anal glands corresponds to the enlarged ducts lined with columnar epithelia and inflammation faded by closing of the duct lumen reconstructed with squamous metaplasia.

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