Solitary Benign Schwannoma of the Foot Presenting Clinically as a Ganglion Cyst

Abstract

An unusual case of solitary benign schwannoma of the foot is presented. Clinical examination, magnetic resonance imaging, and intraoperative findings all confirm the suspicion of a ganglion cyst. After attempted aspiration failed to produce any aspirate, excisional biopsy was performed. The pathology report confirms schwannoma with hematoxylin and eosin stain and subsequently reaffirmed with positive S100 protein stain. Even though schwannoma of the foot had been reported in the literature, this was an unusual case, as the lesion was presented as a superficial, ganglion cyst-like lesion on the bottom of the foot.

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“…He stated that overall, nothing seemed to improve the pain, and that he would have discomfort at random intervals during the day. Soft tissue masses have been documented to have lesions along the course of a single nerve, such as schwannomas, though there are few instances in literature where schwannomas were noted as a raised, palpable and visible soft tissue mass [7]. Given no prior history of gout, and limited clinical findings consistent with gout, other differentials may be considered such as neoplasm, indolent infection, or inflammatory synovitis [8].…”

Endoscopic En-Bloc Resection of Neurilemmoma of the Foot Dorsum

“… 2 , 3 It can involve any nerve of the foot and ankle. 1 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 These tumors are usually asymptomatic unless an increase in size or disruption of the nerve causes pain. 6 , 9 The symptoms of neurilemmoma on the foot and ankle are mainly related to pressure effects on the associated nerve (weakness and paresthesia) or pressure areas (e.g., at the sole).…”