MRI-Based Identification of an Appropriate Point of Needle Insertion for Patients with Idiopathic Carpal Tunnel Syndrome to Avoid Median Nerve Injury

<table>Five entry points of injection. A: through the flexor carpi radialis (FCR) tendon radially tilted at 45 degrees, B: close to the ulnar side of the palmaris longus tendon (PL) tendon, C: at the midpoint between the PL and the flexor carpi ulnaris (FCU) tendons, D: at one-third of the length between the FCR and FCU tendons on the ulnar side, and E: in line with the fourth ray at the pisiform level. Entry points of A, B, C, and D are at the level of the distal part of the distal radioulnar joint.</table>

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Figure 1

Figure 1: MRI-Based Identification of an Appropriate Point of Needle Insertion for Patients with Idiopathic Carpal Tunnel Syndrome to Avoid Median Nerve Injury 

Figure 1 | MRI-Based Identification of an Appropriate Point of Needle Insertion for Patients with Idiopathic Carpal Tunnel Syndrome to Avoid Median Nerve Injury 