J Korean Foot Ankle Soc.  2018 Dec;22(4):166-169. 10.14193/jkfas.2018.22.4.166.

Schwannoma Arising from the Plantar Digital Nerve of the 2nd Toe: A Case Report

• Choi JC
• Song WS
• Kim JM
• Kwon KW

• KMID: 2428657
• DOI: http://doi.org/10.14193/jkfas.2018.22.4.166

Abstract

A schwannoma is a benign tumor that originates from the peripheral nerve sheath. Schwannomas occur most commonly in the head and neck region involving the brachial plexus and the spinal nerves. The lower limbs are less commonly affected. This paper presents a case of a patient with a schwannoma showing atypical localization at the digital nerve of the foot causing neurological symptoms.

Keyword

Foot; Digital nerve; Schwannoma

MeSH Terms

Brachial Plexus
Foot
Head
Humans
Lower Extremity
Neck
Neurilemmoma*
Peripheral Nerves
Spinal Nerves
Toes*

Figure

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  Figure 1. Soft tissue mass at the medial aspect of the 2nd toe of left foot was shown at first presentation.

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  Figure 2. The sagittal (A) and coronal (B) sonogram shows an ovoid shaped low echoic mass. (C) Color-coded Doppler scan shows hypervascularity in the mass.

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  Figure 3. Intraoperative photograph of mass arising from digital nerve of 2nd toe.

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  Figure 4. A well-marginated, encapsulated, 1.8 cm×1.0 cm×1.4 cm sized mass was excised. The cross section of mass appears yellow cut surfaces with vascularity.

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  Figure 5. (A) Pathological features show a characteristic biphasic pattern of Antoni A and Antoni B of neurogenic spindle cell proliferation (H&E stain, ×100). (B) Positive result of immunohistochemical staining for S-100 protein (×100).

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