title: Trichoblastic infundibular cyst.
abstract: We report 4 cases of an infundibular cyst that histopathologically showed small papillary projections of follicular germinative cells emanating from the basal layer of the cyst wall. Some of these projections branched and formed a reticulated pattern. This cystic lesion is histopathologically distinctive. We propose to designate it as a trichoblastic infundibular cyst because its lining resembles that of an infundibular cyst, yet it has cells that resemble those of the follicular germ in its wall.
authors.affiliation: Department of Sensory Medicine, Division of Dermatology and Plastic Surgery, Akita University School of Medicine, Japan. ansai@sapporo-dermpath.com
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Ansai
authors.forename: Masaaki
authors.initials: M
authors.lastname: Tsuda
authors.forename: Hajime
authors.initials: H
authors.lastname: Nagato
authors.forename: Keiko
authors.initials: K
authors.lastname: Nishimaki
authors.forename: Masahiko
authors.initials: M
authors.lastname: Wako
authors.forename: Motomu
authors.initials: M
authors.lastname: Manabe
authors.forename: Takaya
authors.initials: T
authors.lastname: Fukumoto
authors.forename: Tetsunori
authors.initials: T
authors.lastname: Kimura
mesh_terms: D000328:Adult; D000369:Aged, 80 and over; D004814:Epidermal Cyst / Q000473:pathology*; D005497:Follicular Cyst / Q000473:pathology*; D018859:Hair Follicle / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged