A case of nodular fasciitis arising in the auricle.
Nudular fasciitis is an uncommon benign proliferative lesion in the head and neck, and is extremely rare in the auricle. A case of nodular fasciitis arising in the auricle of 53-year-old man is reported by immunohistochemical and electron microscopical studies. Initially, he had noticed a small painless nodule on the posterior side of right auricle, and it grew up rapidly in size over 2 months. A biopsy revealed nodular fasciitis. This lesion was resected totally with the auricular cartilage. Histological examination revealed proliferation of spindle-shaped cells and immunohistochemical-positive staining was observed with actin, and focally positive staining was seen with vimentin. Electron microscopically some tumor cells contained dilated rough endoplasmic reticulum and myofilament-like bundles in cytoplasm.
Katahashi
T
T
Departments of Head and Neck Surgery, Chiba Cancer Center Hospital, Japan.
Shimada
F
F
Omura
K
K
Makino
S
S
Matsuzaki
O
O
D000199:Actins / Q000032:analysis; D001706:Biopsy; D002455:Cell Division / Q000502:physiology; D004427:Ear Diseases / Q000473:pathology*; D004431:Ear, External / Q000473:pathology*; D005208:Fasciitis / Q000473:pathology*; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D014746:Vimentin / Q000032:analysis
D000199:Actins; D014746:Vimentin