“…A peripheral nerve tumor shows a fusiform-shaped mass with tapered ends, appearing heterogeneously hypoechoic with internal vascularity on USG, and high signal intensity lesions showing intense homogeneous enhancement on MRI. 10 , 11 Clinically, reversal responses are defined by heightened inflammation of pre-existing lesions. Nerves can thicken and become painful, and symptoms of a pre-existing peripheral neuropathy (sensory, motor, or autonomic) may appear.…”