Based on the Detwiller sarcoma database analysis, the multiple changes in pcna expression in pleomorphic liposarcoma, leiomyosarcoma, fibrosarcoma, synovial sarcoma, and malignant fibrous histiocytoma were 3.836, 3.155, 3.750, 2.385, and 3.444, respectively. The gene discussed is PCNA; the disease is histiocytoma.