Fig. 2From: Ultrasound-guided needle release of the transverse carpal ligament with and without corticosteroid injection for the treatment of carpal tunnel syndromeTransverse ultrasonic image of the proximal carpal tunnel at the level of the pisiform bone showed thickened median nerve and reduced echo. The area of the median nerve was 0.147 cm2. S scaphoid bone; P pisiform bone; L lateral; M medialBack to article page