Case of cystic schwannoma.
Schwannoma is a well-defined tumor arising from the nerve sheath. It may present as a solitary mass in any part of the body, but is more commonly seen in the head, neck and extremities. We describe a 32-year-old female patient with a small dermal nodule on the forehead, which was 2 cm in diameter, round and of a cystic nature. Microscopic examination revealed that it consisted of compact spindle cells arranged partly in short bundles or a fascicular pattern with outstanding cystic degeneration manifested as a large, unilocular cavity in the center of the tumor tissue. The tumor cells were positive for S-100 protein and negative for epithelial membrane antigen (EMA), while the tumor capsule was positive for EMA. There was no S-100-positive membrane-like structure lining the cyst wall.
Choi
Yu Sung
YS
Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea.
Shin
Mi Seon
MS
Park
Mi Youn
MY
Park
Hyang Joon
HJ
D000328:Adult; D003560:Cysts / Q000209:etiology / Q000473:pathology*; D005153:Facial Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D009442:Neurilemmoma / Q000473:pathology*