Origin And Early Development Of Canine Circumanal Glands

The study investigated the development of canine circumanal glands, focusing on hepatocyte-like cells (HCG). It found that HCG were distinct entities present at birth, developing from hair follicle sheath cells, not from sebaceous glands. Initially absent in fetuses at gestational day 38, HCG rapidly grew within 60 days post-birth, forming organized acini. A second set of glands, transitional HCG (TrHCG), appeared 20 days after birth within sebaceous glands. By 152 days, cysts formed in TrHCG ducts, indicating failed lumen formation for exocrine ducts. The study concluded that HCG are distinct from sebaceous glands and do not fit the exocrine category due to the absence of patent ducts to the skin surface.