Sural nerve schwannoma

Case contributed by Dr Aaron Welk


The patient presented for assessment of anterior knee pain. A palpable mass was detected overlying the medial head of the gastrocnemius. A popliteal cyst was suspected.

Patient Data

Age: 50 years
Gender: Female

Longitudinal and transverse images demonstrate an ovoid, predominantly hypoechoic mass overlying the medial head of the gastrocnemius.  At the proximal and distal ends, the lesion tapers into the normal nerve.  No internal calcifications or regions of necrosis are identified.  There is no peripheral or internal vascularity. 

Case Discussion

The schwannoma presented in this case was incidentally discovered. Based on physical examination of the patient, a popliteal cyst was suspected. Upon further questioning, the patient reported no symptoms related to the schwannoma. No further workup was performed.

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Case information

rID: 38454
Published: 20th Jul 2015
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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