Ultrasound traumatic neuroma

This is a real-time image of the median nerve at the wrist in a patient who had old self-inflected slash wounds on the wrist. Months after this, a small palpable cyst-like structure developed that was sensitive to touch, causing median nerve distribution paresthesias. Ultrasound shows a normal median nerve (N) distal and proximal to this enlarged cystic traumatic neuroma (TN), with demonstrable continuity both in the axial (first segment) and sagittal (second segment) plane as the probe is moved from the wrist proximally over the cystic structure.