The mean density of CTLA-4+ cells was 674 ± 1482 cells/mm2 and ranged from 71 ± 175 cells/mm2 in leiomyoma to 5916 ± 3826 cells/mm2 in Hodgkin’s lymphoma (Fig. 4; Table S1). This evidence concerns the gene CTLA4 and leiomyoma.