Axillary lesion in a young adult ends up to a peculiar diagnosis: Primitive Neuro-Ectodermal Tumor (PNET) of Ulnar Nerve: A rare case report

Primitive neuro-ectodermal tumor (PNET) is a highly aggressive tumor composed of small round blue cells, mostly developing in children and young adults. Being a member of Ewing's Sarcoma Family of Tumors (ESFT); it has been discussed in two subcategories of central and peripheral PNET. PNETs of peripheral nerves are very uncommon pathologic findings, as to the best of our knowledge only 12 well-documented cases have been yet reported.