Soft tissue perineurioma and other unusual tumors in a patient with neurofibromatosis type 1

International Journal of Clinical and Experimental Pathology

Aung Thiha¹  Abbas Agaimy¹  Inga-Marie Schaefer¹  Jan Martin Sohns¹  Silke Pauli¹  Stefan Küffer¹  Christian Mühlfeld¹  Gunther Felmerer¹  Philipp Ströbel¹  Adam Stepniewski¹ 

关键词: Perineurioma;    soft tissue;    neurofibromatosis;    vasculopathy;    NF1;   

DOI  :  

学科分类：生理学与病理学

来源: e-Century Publishing Corporation

【 摘 要 】

Perineurioma is a rare benign peripheral nerve sheath tumor featuring perineurial differentiation. Perineurioma occurs sporadically with only one reported case in the setting of neurofibromatosis type 1 (NF-1). We present a 6.7-cm soft tissue perineurioma of the lower leg in a 51-year-old man with proven NF-1. The tumor displayed whorled and fascicular pattern with infiltrative margins and expressed EMA, GLUT-1, claudin-1, and CD34. Electron microscopy confirmed diagnosis. Furthermore, lipomatosis, cutaneous angiomatous nodules, vasculopathy, and iliac spine lesion consistent with non-ossifying fibroma were observed. Tumor DNA revealed no NF2 mutations or chromosomal aberrations but a germline NF1-deletion (c.449_502delTGTT) was detected in his blood sample. His brother displayed neurofibromas, duodenal ganglioneuroma and colonic juvenile polyp, and his mother a neurofibroma, cutaneous squamous cell carcinoma, and jejunal gastrointestinal stromal tumor (GIST); both were affected by NF-1. In conclusion, perineurioma may rarely be NF-1 related and should be included in the spectrum of neoplasms occurring in this disorder.

【 授权许可】

Unknown