PMC6701310_01
3 MRI views (sagittal, coronal, and axial) of the knee revealing a hyperintense fluid collection within the CPN with connection to the proximal tibiofibular joint, consistent with an intraneural ganglion cyst.
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MRI of the knee revealed a hyperintense fluid collection within the CPN with connection to the proximal tibiofibular joint, consistent with an intraneural ganglion cyst (Figure 1).
The distended common peroneal nerve is seen at its bifurcation. CPN: common peroneal nerve; DPN: deep peroneal nerve; SPN: superficial peroneal nerve.
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The distended CPN was traced to its bifurcation, and the deep and superficial branches were visualized (Figure 2).
The recurrent articular branch stump after ligation and resection.
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To minimize chance of recurrence, primary ligation and resection of the recurrent articular branch of the CPN was performed (Figure 3). After ligation of the recurrent articular branch (Figure 3), it was sent for histopathological examination along with the expressed fluid.
Hematoxylin and eosin-stained high-power photomicrograph. Cross-section of resected intraneural ganglion cyst. P: perineurium; E: epineurium; B: blood vessel; M: mucin. F: fascicle. Stringy grey-blue-stained mucin is seen within the epineural layer consistent with an intraneural ganglion cyst.
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The report confirmed an intraneural ganglion cyst with normal-appearing nerve fascicles and no evidence of metaplasia (Figure 4).