THY1 and T-cell non-Hodgkin lymphoma: Thy-1 (CD90), a marker found to be upregulated in all mature T-cell lymphoma subtypes, is a marker for thymus-derived lymphocytes in mice [56], with additional implications for being a “cancer stem cell” marker present in both T- and B-malignancies due to its upregulation on immature cells [41, 57, 58].