イヌの肛門周囲腺の構造と発達に関する研究

概要

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The development and structure of the perianal gland were studied his-tologically in 74 dogs of age 0 day to 16 years. The gland was seen already in 14-day-oldpuppies of both sexes, and in dogs younger than 9 months old it opened to the hairfollicle through an excretory duct. The glandular tissues of adult dogs developed flourish-ingly around semi-closed duct-like structures which fused with each other forming a"tortoise-shell" lobules without connection to hair follicles. In electron microscopy, theglandular cells were divided into two types, light and dark cells, and the former typeof cells had well-developed vacuoles. No secretory granules were contained in both typesof cells. In larger lobules of adult male dogs, intralobular cysts developed occasionallyshowing sometimes a central necrosis. This might result from a rapid and successiveconversion of tubular cells to glandular cells. Some glandular tissues comparable to theperianal gland were detected also at the loin, the prepuce, the dorsal and ventral partsof the tail, and the groin. Administration of testosterone propionate to 60-day-old pup-pies induced a significant developmernt of the glandular tissues which became to havesize and structure comparable to those in adult dogs.
社団法人日本獣医学会の論文
1975-08-25