Hypofractionated radiotherapy for breast cancer patients treated by breast-conserving surgery: short-term morbidity and preliminary results.
BACKGROUND
Hypofractionated adjuvant radiotherapy (RT) in breast cancer patients treated by conservative surgery has been increasingly used in recent years. We present our experience regarding tolerance/acute toxicity of a hypofractionated RT schedule.


METHODS
We report on 339 patients treated for 4 years (March 2003-2007) by 42.5 Gy/16 fractions at the RT Department of Larissa University Hospital. Electron boost of 9-10 Gy/3-4 fractions was given to 104/339 (31%). Axillary/supraclavicular RT was given to the node-positive patients with the same fractionation schedule. Median follow-up time was 24 months.


RESULTS
RTOG grades 0, 1, 2, 3, and 4 for acute skin toxicity were 9.7, 68.7, 17.5, 4, and 0.3%, respectively. Radiation pneumonitis (resolved promptly by steroids) was suspected/diagnosed in 11/339 (3.2%). A total of 8/11 had been treated by regional lymphatics RT. In the univariate analysis, the following variables were examined as predictive of skin (grade >1) and lung (any grade) reactions: age, chemotherapy, endocrine treatment, RT of regional lymphatics, and boost RT. The only significant correlation was that of radiation pneumonitis and RT of regional lymphatics (Fisher's exact test, P = 0.000).


CONCLUSIONS
Our current results are similar to those from other centers, although they need to be evaluated for a longer time. This fractionation seems to be effective with acceptable side effects, while it facilitates the treatment for both patients and RT centers.
Plataniotis
Georgios A
GA
Department of Oncology, Aberdeen Royal Infirmary, Foresterhill, Aberdeen, UK. george.plataniotis@nhs.net
Theofanopoulou
Maria-Aikaterini
MA
Sotiriadou
Konstantinia
K
Kyrgias
Georgios
G
D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery; D018270:Carcinoma, Ductal, Breast / Q000532:radiotherapy* / Q000556:secondary / Q000601:surgery; D018275:Carcinoma, Lobular / Q000532:radiotherapy* / Q000556:secondary / Q000601:surgery; D019583:Dose Fractionation, Radiation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008198:Lymph Nodes / Q000378:metabolism / Q000473:pathology; D015412:Mastectomy, Segmental; D008875:Middle Aged; D009017:Morbidity; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D011379:Prognosis; D018714:Radiotherapy, Adjuvant; D015996:Survival Rate; D016896:Treatment Outcome