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J Korean Soc Ther Radiol Oncol > Volume 24(4); 2006 > Article
The Journal of the Korean Society for Therapeutic Radiology and Oncology 2006;24(4): 248-254.
Intensity Modulated Whole Pelvic Radiotherapy in Patients with Cervix Cancer: Analysis of Acute Toxicity
Youngmin Choi, Hyung Sik Lee, Won Joo Hur, Moon Seok Cha, Hyun Ho Kim
1Department of Radiation Oncology, School of Medicine, Dong-A University, Busan, Korea. cymin00@dau.ac.kr
2Department of Obstetrics and Gynecology, School of Medicine, Dong-A University, Busan, Korea.
To evaluate acute toxicities in cervix cancer patients receiving intensity modulated whole pelvic radiation therapy (IM-WPRT).
Between August 2004 and April 2006, 17 patients who underwent IM-WPRT were analysed. An intravenous contrast agent was used for radiotherapy planning computed tomography (CT). The central clinical target volume (CTV) included the primary tumor, uterus, vagina, and parametrium. The nodal CTV was defined as the lymph nodes larger than 1 cm seen on CT and the contrased-enhanced pelvic vessels. The planning target volume (PTV) was the 1-cm expanded volume around the central CTV, except for a 5-mm expansion from the posterior vagina, and the nodal PTV was defined as the nodal CTV plus a 1.5 cm margin. IM-WPRT was prescribed to deliver a dose of 50 Gy to more than 95% of the PTV. Acute toxicity was assessed with common toxicity criteria up to 60 days after radiotherapy.
Grade 1 nausea developed in 10 (58.9%) patients, and grade 1 and 2 diarrhea developed in 11 (64.7%) and 1 (5.9%) patients, respectively. No grade 3 or higher gastrointestinal toxicity was seen. Leukopenia, anemia, and thrombocytopenia occurred in 15 (88.2%). 7 (41.2%), and 2 (11.8%) patients, respectively, as hematologic toxicities. Grade 3 leukopenia developed in 2 patients who were treated with concurrent chemoradiotherapy.
IM-WPRT can be a useful treatment for cervix cancer patients with decreased severe acute toxicities and a resultant improved compliance to whole pelvic irradiation.
Key Words: Cervix cancer, Intensity modulated radiotherapy, Acute toxicity
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