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The patient is an 80-year-old female who presents with chief complaint of progressive proximal muscle weakness and carries a clinical diagnosis of polymyositis for nearly two decades. She was placed on a maintenance dose of steroids and was lost to follow-up for several years. No statin medication is reported. She was recently admitted after a wellness check revealed that she was unable to ambulate independently. CPK values ranged from 1500-7700. A skeletal muscle biopsy of the left thigh was performed. A follow-up myositis serology panel showed a positive anti-signal recognition particle (+ anti-SRP). Using the images, what’s your diagnosis for...