Effect of non-Hodgkin lymphoma on survival in patients with malignant fibrous histiocytoma, Kaposi sarcoma, and sebaceous carcinoma: A seer population-based study

OBJECTIVE: To quantify the behavior of dermatofibrosarcoma protuberans (DFSP), malignant fibrous histiocytoma (MFH), Kaposi sarcoma (KS), and sebaceous carcinoma (SC) in patients with a history of non-Hodgkin lymphoma (NHL). PATIENTS AND METHODS: Subjects with a diagnosis of DFSP, MFH, KS, or SC between 1990 and 2006 were identified in the Surveillance, Epidemiology, and End Results Program database. For each skin cancer type, the standardized mortality ratio (SMR) for death due to any cause and death due to skin cancer was estimated. RESULTS: From 1990 through 2006, 25,357 skin cancers were identified: 4,192 DFSP, 6,412 MFH, 10,543 KS, and 4,222 SC. For patients with a history of non-CLL NHL, SMRs for death due to any cause were 1.45 (95% confidence interval [CI], 1.03-2.04; p = 0.04) for MFH, 2.90 (95% CI, 2.50-3.36; p <0.001) for KS, and 3.25 (95% CI, 1.84-5.75; p <0.001) for SC and SMRs for death due to skin cancer were 0.55 (95% CI, 0.23-1.31; p = 0.18) for MFH, 2.93 (95% CI, 2.49-3.43; p <0.001) for KS, and 4.07 (95% CI, 1.28-12.94; p <0.001) for SC. CONCLUSION: Among patients with KS and SC, patients with a history of non-CLL NHL have a greater risk of overall and cause-specific death than expected.