Histopathologic Evaluation of Atypical Neurofibromatous Tumors and Their Transformation into Malignant Peripheral Nerve Sheath Tumor in Neurofibromatosis 1 Patients – A Consensus Overview

Neurofibromatosis 1 (NF1) patients develop multiple neurofibromas, with 8-15% of patients experiencing malignant peripheral nerve sheath tumor (MPNST) during their lifetime. Prediction of transformation, typically from plexiform neurofibroma, is clinically and histologically challenging. In this overview, following a consensus meeting in October 2016, we outline the histopathologic features and molecular mechanisms involved in the malignant trans-formation of neurofibromas. Nuclear atypia alone is generally insignificant.

http://ift.tt/2qY9qPN