Trends in the incidence, survival, and prognostic nomogram of angiosarcoma in the United States

This is the authors' abstract. We don't add key points for this paper.

This study aimed to investigate the epidemiological trends of angiosarcoma and to establish a tool to estimate its prognosis. Data from the Surveillance, Epidemiology, and End Results (SEER) database (1975-2016) were used to assess trends in the epidemiology of angiosarcoma, and a nomogram was established based on independent prognostic factors. The age-adjusted incidence of angiosarcoma gradually increased from 0.13/100,000 in 1975 to 0.33/100,000 in 2016 (annual percentage change [2.4]). The most significant increase was observed in patients aged ≥ 60 years. The same increasing trend was observed across all the stages and grades. The limited-duration prevalence increased from 0.0003% in 1992 to 0.0013% in 2016 (P < .05). In multivariable analyses, age, sex, marital status, grade, historical stage, surgery, site, and tumor size were independent prognostic factors for angiosarcoma. The concordance index of the nomogram was significantly higher than that of the American Joint Committee on Cancer (AJCC) 6th edition and the AJCC 7th edition (0.74 vs 0.61 vs 0.66, respectively). Calibration analysis showed optimal agreement between nomogram predictions and actual observations. The incidence and prevalence of angiosarcoma has increased over the past 40 years. We established a nomogram to predict the overall survival of patients with angiosarcoma.

Rising angiosarcoma incidence warrants awareness; SEER nomogram may aid prognostication but requires validation.