case_images: PMC5365229_01
case_images: MRI scan showing an oval, well circumscribed and homogenous lesion lying near the ischial tuberosity.
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case_images: 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).
case_images: MRI scan revealing the unusual location of the tumor with a hypo-intense rim along the course of the sciatic nerve.
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case_images: The unusual location of the lesion was in favor of a schwannoma rather than a neurofibroma ( Figure 2).
case_images: Gross image of the excised lesion.
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case_images: It was carefully dissected off the nerve fascicles and fully removed ( Figure 3).
case_images: 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.
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case_images: 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).