PMC10200084_01
Preoperative picture, showing weak extension of fourth and fifth metacarpophalangeal joints
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For the last one month, there was development of deficit of extension of fourth and fifth finger (Figure 1).
Magnetic Resonance Imaging coronal proton density-weighted images, showing a well-defined, heterogenous, predominantly hyperintense signals in lesion of 5.5 x 3.5 x 3 centimeter in posterolateral right forearm, dissecting the inter-muscular planes
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F2
T1-weighted and proton density-weighted images. (Figure 2) Split fat sign and fascicular sign was present. This was suspicious for peripheral nerve sheath tumour (one of the types of which, is schwannoma) (Figure 2). The mass was noted to be compressing the PIN within the interosseous space.
a. Intraoperative picture, showing the tumors displacing muscles laterally. b. Intraoperative picture, showing preserved PIN (held by loop) after tumors is dissected out. c. Cut section of the tumors. The tumour was well encapsulated and extra-capsular dissection was possible
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