HMGCR and myopathy: Thirty patients with genetically proven LGMDR2 and 45 with IMNM (15 with the anti-SRP autoantibody, 15 with the anti-HMGCR autoantibody, and 15 with seronegative IMNM) were selected from one hundred patients who underwent muscle MRI examinations for myopathy between July 2014 and August 2022.