cases, soft tissue Week 137: Case 1 April 26, 2023 pathadmin 1. Presented by Ralph Hruban, M.D. and prepared by Lynette S. Nichols, M.D.This patient was found to have a small nodule on the flexor surface of his upper extremity.SchwannomaPlexiform neurofibromaMucosal neuromaMalignant peripheral nerve sheath tumor 1. Presented by Ralph Hruban, M.D. and prepared by Lynette S. Nichols, M.D.This patient was found to have a small nodule on the flexor surface of his upper extremity.