SMARCB1 and epithelioid sarcoma: The immunohistochemical examination revealed that the tumor cells were positive for pan-cytokeratin, CD34, and Friend leukemia integration 1 transcription factor but negative for BAF47/integrase interactor 1 (Figure 1D), leading to the diagnosis of epithelioid sarcoma, which is an extremely rare malignant soft-tissue tumor (1).