XPC and TANK have been identified in Hodgkin Lymphoma (HL); BCOR in T‐prolymphocytic leukemia (T‐PLL), Chronic lymphocytic leukemia (CLL), diffuse splenic lymphoma of the red pulp and extranodal NK/T‐cells lymphoma, nasal type; TYK2 in anaplastic large cell lymphoma (ALCL); TCF3 in Burkitt lymphoma (BL) and B‐lymphoblastic lymphoma (B‐LBL); ZFHX4 in B‐LBL, and BRAF‐V600 in Hairy cell leukemia (HCL). The gene discussed is TYK2; the disease is hairy cell leukemia.