Extraskeletal XXXX Arising from the Sciatic Nerve: A Diagnostic Challenge.

@entity5 @entity2828 @entity1 @entity158
@entity2828 is a common @entity5 of childhood but is a rare occurrence in individuals over 20 years of age. Few cases are reported as originating from peripheral nerves. We present an unusual case of extraosseous @entity2828 originating from the sciatic nerve in a 66-year-old @entity1 which had the clinical hallmarks of a @entity5 . Following discussion at a multidisciplinary meeting, excision biopsy of the suspected @entity5 was planned. At operation, the mass had malignant features. Histology confirmed the presence of @entity2828 . Due to the morbidity of nerve resection, radiotherapy and chemotherapy were commenced. @entity2828 is known to mimic benign pathologies. In this case there were subtle signs of a malignant process in the form of unremitting @entity158 . It is vital to keep in mind the less common @entity5 that can affect the peripheral nervous system in such cases.
