Trichoblastic infundibular cyst.
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.
Ansai
Shin-Ichi
S
Department of Sensory Medicine, Division of Dermatology and Plastic Surgery, Akita University School of Medicine, Japan. ansai@sapporo-dermpath.com
Tsuda
Masaaki
M
Nagato
Hajime
H
Nishimaki
Keiko
K
Wako
Masahiko
M
Manabe
Motomu
M
Fukumoto
Takaya
T
Kimura
Tetsunori
T
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