Abstract
There are a few reports on tarsal tunnel syndrome resulting from the intraneural ganglion. Although it can occur through a connection with the adjacent joint, there is no consensus on its pathogenesis and treatment method. This paper reports a case of tarsal tunnel syndrome resulting from the intraneural ganglion of the medial plantar nerve of the tibial nerve.
Figures and Tables
Figure 1
(A, B) Magnetic resonance images showed a 1.5×1.5-cm-sized cystic mass around the medial plantar nerve with homogeneous low signal intensity on the T1-weighted image and homogeneous high signal intensity on T2-weighted image. (C) Axial T2 image was suspected as an articular branch of intraneural ganglion connecting to the adjacent subtalar joint. Asterisk, medial plantar nerve intraneural ganglion.
![jkfas-22-44-g001](/upload/SynapseData/ArticleImage/0120jkfas/jkfas-22-44-g001.jpg)
Figure 3
The cystic mass was aspirated using a syringe, following the decompressed nerve was identified.
![jkfas-22-44-g003](/upload/SynapseData/ArticleImage/0120jkfas/jkfas-22-44-g003.jpg)
Figure 4
After the aspiration, as shown in the magnetic resonance images, cystic mass and its articular branch connecting to the adjacent subtalar joint were identified. Dashed line, decompressed medial plantar nerve; black arrowheads, articular branch.
![jkfas-22-44-g004](/upload/SynapseData/ArticleImage/0120jkfas/jkfas-22-44-g004.jpg)
Figure 5
Connection between cystic mass and adjacent subtalar joint was identified behind the sustentaculum tali (white arrowheads). Meticulous debridement of the involved joint capsule and flexor halluces tendon sheath was performed.
![jkfas-22-44-g005](/upload/SynapseData/ArticleImage/0120jkfas/jkfas-22-44-g005.jpg)
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