title: Melanocytic matricoma: two cases of a rare entity in women.
abstract: Melanocytic matricoma is a rare cutaneous adnexal tumor occurring in humans with only 13 cases reported in the literature. The typical lesion is a circumscribed pigmented nodule on sun-damaged skin. Most cases have occurred in elderly men. The tumor contains a mixed population of matrical cells, supramatrical cells, shadow or ghost cells, and dendritic melanocytes. We report two cases of melanocytic matricoma in two elderly women with unusual histopathological features such as cystic degeneration and focal granulomatous inflammation, which are considered to be atypical for this entity.
authors.affiliation: Department of Pathology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors.forename: Jantima
authors.initials: J
authors.lastname: Tanboon
authors.forename: Jane
authors.initials: J
authors.lastname: Manonukul
authors.forename: Penvadee
authors.initials: P
authors.lastname: Pattanaprichakul
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D004847:Epithelial Cells / Q000378:metabolism / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008544:Melanocytes / Q000378:metabolism / Q000473:pathology; D008875:Middle Aged; D018294:Neoplasms, Adnexal and Skin Appendage / Q000473:pathology / Q000648:ultrastructure; D018296:Pilomatrixoma / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology*
keywords: adnexal neoplasm; basal cell carcinoma; matrical differentiation; melanocytic matricoma; pilomatricoma