<prompt> What is the diagnosis of this patient?Myasthenia gravisCongenital myopathyInclusion body myositisMuscular dystrophy  <response>: The image shows pseudo-hyperophy of calf muscles seen in Duchennes muscular dystrophy. Causes of pseudo-hyperophy of calf muscles 1. Dystrophinopathy like Beckers and Duchennes 2. Limb-girdle muscular dystrophy 3. Spinal muscular atrophy 4. Glycogen storage disorders 5. Myxedema in Hypothyroidism 6. Sarcoidosis, Cysticercosis, and amyloidosis 7. Focal myositis 8. Ruptured muscle tendon 9. A muscle tumor or a muscle hernia 