Cytologic Aspect of Keratoacanthoma with Granulomatous Inflammation in a Dog

다국어 초록 (Multilingual Abstract)

A 5-year-old Pekinese dog was presented for evaluation of a back mass of 1 year duration. Fine needle
aspiration cytology of the mass revealed numerous keratinocytes, and a lesser number of multinucleated giant cells
along with a low number of spindle cells, which were suggestive of epidermal cyst or hair follicle tumor with secondary
granulomatous inflammation. The mass was surgically removed and examined histologically. Microscopically there was
partially encapsulated well-demarcated nodule in deep dermis and subcutis. The nodule consisted of central cyst and
secondary cysts that were lined by a single or multiple layers of basaloid cells and squamous epitheliums with central
laminated keratin. Multifocal aggregation of numerous macrophages and multinucleated giant cells were present. The
final diagnosis was keratoacanthoma with granulomatous inflammation. The mass did not recur 5 months after surgery.

참고문헌 (Reference)

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