PMC5365229_01
MRI scan showing an oval, well circumscribed and homogenous lesion lying near the ischial tuberosity.
f1000research-6-11983-g0000.jpg
PMC5365229_01_f1000research-6-11983-g0000.jpg
f1
Radio imaging with help of an MRI scan revealed the presence of a sciatic tumor alongside the sciatic nerve, near the ischial tuberosity on the right side ( Figure 1).
MRI scan revealing the unusual location of the tumor with a hypo-intense rim along the course of the sciatic nerve.
f1000research-6-11983-g0001.jpg
PMC5365229_01_f1000research-6-11983-g0001.jpg
f2
The unusual location of the lesion was in favor of a schwannoma rather than a neurofibroma ( Figure 2).
Gross image of the excised lesion.
f1000research-6-11983-g0002.jpg
PMC5365229_01_f1000research-6-11983-g0002.jpg
f3
It was carefully dissected off the nerve fascicles and fully removed ( Figure 3).
Photomicrograph of tissue taken from the lesion excised from the patient showing cells within Antoni A and Antoni B regions that are characteristic of schwannoma.
f1000research-6-11983-g0003.jpg
PMC5365229_01_f1000research-6-11983-g0003.jpg
f4
The histopathological report confirmed the diagnosis of a sciatic nerve schwannoma, owing to the presence of Antoni A and B areas and Verocay bodies ( Figure 4).