Peng Zhang1,2, Lei Zhao1,2, Yu-Jia Zhu1,2, Bo Qiu1,2, Su-Ping Guo1,2, Yong Li1,3, Qing Liu4, Meng-Zhong Liu1,2, Mian Xi5,6. 1. State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China. 2. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China. 3. Department of Pathology, Cancer Center, Sun Yat-Sen University, Guangzhou, China. 4. Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China. 5. State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China. ximian@sysucc.org.cn. 6. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China. ximian@sysucc.org.cn.
Abstract
PURPOSE: To determine whether radiation-induced fibrosarcoma (RIF) in patients with a history of radiotherapy for nasopharyngeal carcinoma (NPC) was associated with an inferior prognosis compared to sporadic fibrosarcoma of the head and neck. METHODS: Forty-two patients with RIF who previously received radiotherapy for NPC and 124 patients with sporadic fibrosarcoma of the head and neck were identified between January 1965 and December 2013 at our institution. Information on clinicopathologic characteristics and treatment was abstracted from medical records. The primary end point was disease-specific survival (DSS). RESULTS: The median latency from NPC diagnosis to RIF diagnosis was 9.9 years (range 3.1-36.8 years). RIF was diagnosed at an older age than sporadic fibrosarcoma. Treatment modality was significantly different between the two groups, with only 64.3 % of the RIF group receiving surgery ± adjuvant treatment versus 91.1 % in the sporadic fibrosarcoma group (P < 0.001). Patients with RIF had poorer 5-year DSS compared to the sporadic fibrosarcoma group (36.2 vs. 50.4 %; P = 0.026). Multivariate analysis of the combined group indicated that patient group (P = 0.032), tumor, node, metastasis classification system stage (P = 0.019), histologic grade (P = 0.046) and treatment modality (P < 0.001) were independent variables affecting DSS. CONCLUSIONS: Compared to patients with sporadic fibrosarcoma, NPC survivors who develop RIF are older at diagnosis of fibrosarcoma and have an inferior prognosis.
PURPOSE: To determine whether radiation-induced fibrosarcoma (RIF) in patients with a history of radiotherapy for nasopharyngeal carcinoma (NPC) was associated with an inferior prognosis compared to sporadic fibrosarcoma of the head and neck. METHODS: Forty-two patients with RIF who previously received radiotherapy for NPC and 124 patients with sporadic fibrosarcoma of the head and neck were identified between January 1965 and December 2013 at our institution. Information on clinicopathologic characteristics and treatment was abstracted from medical records. The primary end point was disease-specific survival (DSS). RESULTS: The median latency from NPC diagnosis to RIF diagnosis was 9.9 years (range 3.1-36.8 years). RIF was diagnosed at an older age than sporadic fibrosarcoma. Treatment modality was significantly different between the two groups, with only 64.3 % of the RIF group receiving surgery ± adjuvant treatment versus 91.1 % in the sporadic fibrosarcoma group (P < 0.001). Patients with RIF had poorer 5-year DSS compared to the sporadic fibrosarcoma group (36.2 vs. 50.4 %; P = 0.026). Multivariate analysis of the combined group indicated that patient group (P = 0.032), tumor, node, metastasis classification system stage (P = 0.019), histologic grade (P = 0.046) and treatment modality (P < 0.001) were independent variables affecting DSS. CONCLUSIONS: Compared to patients with sporadic fibrosarcoma, NPC survivors who develop RIF are older at diagnosis of fibrosarcoma and have an inferior prognosis.
Authors: Andrés Coca-Pelaz; Antti A Mäkitie; Primož Strojan; June Corry; Avraham Eisbruch; Jonathan J Beitler; Sandra Nuyts; Robert Smee; Johannes A Langendijk; William M Mendenhall; Cesare Piazza; Alessandra Rinaldo; Alfio Ferlito Journal: Adv Ther Date: 2020-11-13 Impact factor: 3.845