Extra-adrenal paraganglioma of the median nerve.

An extra-adrenal paraganglioma is an uncommon tumour that arises from the paraganglia associated with the autonomous nervous system. A paraganglioma arising in the sensory-somatic nervous system is extremely rare and clinically is easily confused with other neurogenic tumours. We describe a paraganglioma that arose in the median nerve of a 22-year-old woman.