@article{oai:nagasaki-u.repo.nii.ac.jp:00020267, author = {Wen, Chunyang and Ito, Masahiro and Chen, Long-Dian and Nakayama, Toshiyuki and Nakashima, Masahiro and Tsuneda, Katsumi and Sekine, Ichiro}, issue = {1-2}, journal = {Acta medica Nagasakiensia}, month = {Jun}, note = {Cellular neurothekeoma preferentially affects women and has a predilection for the head, neck and arms of children and young adults. Cellular neurothekeoma is a wellcircumscribed tumor involving the reticular dermis and consisting of fascicles of polygonal or spindle cells with eosinophilic cytoplasma and neuroid characteristics. We describe an additional case of cellular neurothekeoma on the upper lip. Microscopically, the neoplasm had a multinodular or lobulated architecture that were partially or completely invested by a dense band of collagen and was composed of plump, spindled, and epithelioid cells arranged in solid, infiltrating nests and fascicles. Cytologically, the neoplastic cells were relatively large and contained lightly eosinophilic, finely vacuolated cytoplasm. The nuclei were round to oval with vesicular chromatin, with no atypical mitotic figures identified. Immunohistochemical examinatioa showed that the neoplastic cells were diffusely positive for vimentin and positive for NSE, but were negative for S-100 protein. Our case was a representative example of a typical cellular neurothekeoma., Acta medica Nagasakiensia. 2002, 47(1-2), p.71-73}, pages = {71--73}, title = {Cellular Neurothekeoma A with an Immunohistochemical Study}, volume = {47}, year = {2002} }