SOCS1 has also been found to be mutated in malignancies involving other lymphoid malignancies, including T cell prolymphocytic leukemia (T-PLL) (142), NK/T cell lymphoma (143), enteropathy-associated T cell lymphoma (EATL) (144), as well as mycosis fungoides, a cutaneous T cell lymphoma (CTCL) (145). The gene discussed is SOCS1; the disease is T-cell prolymphocytic leukemia.