Theterminclusionbodymyositiswas firstused by Yunis and Samaha' in 1971 when they described patients with a slowly progressive myopathy and characteristic nuclear and cyto- plasmicfilamentousinclusionsaccompaniedby vacuoles rimmed by basophilic material in the
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Department of
Histopathology,
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Queen'sMedicalCentre, musclefibres(