This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Perifascicular atropy of muscle fibres is seen in? \nSelect and explain. \nA. Steroid myopathy, B. Dermatomyositis, C. Inclusion body myositis, D. Nemaline myopathy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Dermatomyositis Dermatomyositis is a connective-tissue disease related to polymyositis that is characterized by inflammation of the muscles and the skin. It is a systemic disorder that may also affect the joints, the esophagus, the lungs, and, less commonly, the hea. On the muscle biopsy, there are two classic microscopic findings of dermatomyositis. They are : mixed B- & T-cell perivascular inflammatory infiltrate and perifascicular muscle fiber atrophy. It is associated with autoantibodies, especially anti-Jol antibody.", 'role': 'assistant'}]