1Department of Radiation Oncology,Shanghai Proton and Heavy Ion Center,Shanghai 201315,China; 2Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy,Shanghai 201315,China; 3Department of Radiation Oncology,Fudan University Cancer Hospital,Shanghai 200032,China
Abstract：Objective To observe the short-term effect and toxicities after carbon ion radiotherapy (CIRT) for tracheal adenoid cystic carcinoma (TACC). Methods From March 2016 to October 2017,a total of 10 patients with TACC were treated using CIRT.Among them,three patients had recurrent disease (two after surgery,and one after brachytherapy),one received bronchoscopic cryosurgery for stage Ⅰ disease,and the other 9 had locally advanced disease (3/6 received endoscopic treatment before CIRT).All patients received CIRT using pencil-beam scanning technique. Except that the patient with recurrent disease after brachytherapy received 60 GyE/20 Fx,the patient received cryosurgery and one recurrent patient after surgery received 66 GyE/22 Fx,all other patients received 69 GyE/23 Fx. Results The median follow-up time was 5.5(1.5-16.4) months. Among the 9 patients with gross tumors,3 patients achieved complete response,2 achieved partial response,and 4 remained stable disease per RECIST 1.1 criteria. The post-cryosurgery patient remained no evidence of disease. Except 1 patient experienced grade 4 tracheal stenosis,no other grade ≥3 adverse effects were observed. Grade 2 acute toxicities included 1 hoarseness and 1 neutropenia,both relieved after CIRT.Hypothyroidism in one patient was the only observed grade 2 late toxicity. Conclusion CIRT is safe and effective in the management of TACC during a short-time observation.
Chen Jian,Mao Jingfang,Ma Ningyi et al. Preliminary Observation of Carbon Ion Radiotherapy for Tracheal Adenoid Cystic Carcinoma[J]. Chinese Journal of Radiation Oncology, 2019, 28(3): 168-172.
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2019, Vol. 28 
