Details

Autor(en) / Beteiligte

• Lu, Shun
• Wang, Shubin
• Kim, Robert Y.
• Zhang, Jiayu
• Wang, Xianliang
• Wang, Weidong
• Zhu, Guiquan
• Zhou, Jie
• Tan, Yan
• Tan, Mingyu
• Li, Minglun
• Yin, Gang
• Li, Jie
• Feng, Mei
• Lang, Jinyi

Titel

Clinical outcomes of conventional HDR intracavitary brachytherapy combined with complementary applicator‐guided intensity modulated radiotherapy boost in patients with bulky cervical tumour

Ist Teil von

• BJOG : an international journal of obstetrics and gynaecology, 2023-01, Vol.130 (2), p.231-237

Ort / Verlag

England: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Access via Wiley Online Library

Beschreibungen/Notizen

• Objective To investigate the clinical outcomes and toxicity in patients with locally advanced cervical cancer treated with supplementary applicator guided‐intensity modulated radiation therapy (IMRT) based on conventional intracavitary brachytherapy (IC/IMRT). Design A retrospective cohort study. Setting Sichuan Cancer Hospital & Institute, Sichuan Cancer Centre, China. Population Large high‐risk clinical target volume (HR‐CTV) volume (>40 ml) at the time of brachytherapy cervical cancer patients were recruited. Methods This study is a retrospective analysis of 76 patients with locally advanced cervical cancer (FIGO IIB‐IVA) treated with concurrent chemoradiotherapy followed by IC/IMRT between June 2010 and October 2016. External radiotherapy (45 Gy in 25 fractions) was adminstered with cisplatin chemotherapy treatment before IC/IMRT. The IMRT plan was optimised using the ICBT plan base dose plan by an inverse dose optimisation tool which allows the use of DVH constraints on the total dose of ICBT. A seven‐field gantry angle IMRT plan was devised to avoid hotspots when optimising the boost plan. The prescription dose for HR‐CTV and IR‐CTV were 6 and 5 Gy per fraction for five fractions, respectively. Results Mean HR‐CTV was 65.8 ± 23.6 ml at the time of brachytherapy. D90 for HR‐CTV and IR‐CTV were 88.7 ± 3.6 Gy and 78.1 ± 2.5 Gy. D2cc for bladder, rectum, sigmoid and small intestine were 71.8 ± 3.8, 64.6 ± 4.9, 63.9 ± 5.3 and 56.7 ± 8.7 Gy, respectively. Median follow‐up was 85 months (47.9–124.2 months). Five‐year local recurrence‐free survival rate, metastasis recurrence‐free survival rate, disease‐free survival rate and cancer‐special survival rate were 87.6, 82.4, 70.9 and 76.3%, respectively. The grade 1 + 2 gastrointestinal and urinary late toxicities were 15.8 and 21.1%, and grade 3 late toxicities were 3.9 and 5.2%, respectively. Neither acute nor late grade 4 gastrointestinal or urinary toxicities were seen. Conclusions The combination of ICBT with an applicator‐guided supplementary IMRT boost achieved excellent local control and overall survival with low toxicity for bulky residual cervical tumour.