Fig. 2.
Right gastrocnemius muscle biopsy showed hallmark of non-caseating granuloma of sarcoidosis. Central area of multinucleated giant cells, epithelioid cells and macrophages surrounded by lymphocytes and fibroblasts (arrow). Gastrocnemius biopsy; hematoxylin–eosin (H&E) stain; original magnification, 40×.