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A Soft Tissue Perineurioma and a Hybrid Tumor of Perineurioma and Schwannoma

Perineuriomas are composed of differentiated perineurial cells. Perineuriomas have been recently recognized by the immunoreactivity for epithelial membrane antigen (EMA). Microscopically, perineuriomas show proliferation of spindle cells with wavy nuclei and delicate elongated bipolar cytoplasmic pr...

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Detalles Bibliográficos
Autores principales: Park, Ji Young, Park, Nam Jo, Kim, Sang Pyo, Kwon, Kun Young, Lee, Sang Sook
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Korean Society of Pathologists and The Korean Society for Cytopathology 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3479702/
https://www.ncbi.nlm.nih.gov/pubmed/23109982
http://dx.doi.org/10.4132/KoreanJPathol.2012.46.1.75
Descripción
Sumario:Perineuriomas are composed of differentiated perineurial cells. Perineuriomas have been recently recognized by the immunoreactivity for epithelial membrane antigen (EMA). Microscopically, perineuriomas show proliferation of spindle cells with wavy nuclei and delicate elongated bipolar cytoplasmic processes. The tumor cells are usually negative for the S-100 protein. Ultrastructurally, perineurial cells reveal slender, nontapered processes containing pinocytic vesicles and discontinuous basal lamina. Interestingly, hybrid tumors of benign peripheral nerve sheath tumor (PNST) have been recently reported by using immunohistochemical and ultrastructural investigations. Herein, we report a case of soft tissue perineurioma arising in the skin of a 56-year-old female; another case of a hybrid tumor of perineurioma and schwannoma in the posterior mediastinum occurred in a 53-year-old male, which is the first case of the hybrid PNST tumor reported in Korea.