A 12-year-old boy presents with progressive left foot weakness. Electromyography showed a severe left common peroneal neuropathy. Ultrasound showed an intraneural tumor. H&E sections a immunohistochemical stains of the lesion are shown. What is your diagnosis?

A. Schwannoma

B. Plexiform neurofibroma

C. Perineurioma

D. Localized hypertrophic neuropathy