SSX1 and breast cancer: In other reports of SSX family member tumor expression, SSX5 expression has been found in multiple myeloma [86], osteosarcoma [89], and hepatocellular carcinoma [81], while SSX1 expression has been found in these tumors as well as nonsmall cell lung cancer, Hodgkin's lymphoma, nonHodgkin's lymphoma, leukemia, bladder cancer, breast cancer, colorectal cancer, endometrial cancer, head and neck cancer, and malignant melanoma [76, 77, 80–84, 86, 88, 89].