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Aims: To determine the incidence of cancer treatment-induced diarrhoea in patients submitted to irradiation., Methods: Forty-five Italian radiation oncology departments took part in this prospective observational study and a total of 1020 patients were enrolled. The accrual lasted three consecutive weeks; evaluation was based on diary cards filled in daily by patients during radiotherapy and one week after cessation. Diary cards recorded both the onset and intensity of diarrhoea., Results: A total of 1004 patients were eligible for this analysis. 147/1004 (14.6%) patients had diarrhoea. The median minimum number of daily events was 1 (range 1-7) with a median maximum events of 3 (range 1-23). 82/147 patients (56.2%) had a drug prescription for diarrhoea. In the evaluation of the onset of diarrhoea, in multivariate analysis, we found the following factors to be statistically significant predictors of an increased likelihood of diarrhoea: primitive tumour site, therapeutic purpose and field size., Conclusions: Patients with abdominal-pelvic cancer, treated with curative purpose and using large field sizes are at high risk of cancer treatment-induced diarrhoea. Diarrhoea was also observed in patients treated at other sites. In this population group there is the need for more stringent monitoring during the delivery of radiation therapy., (Copyright © 2013 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.)

Purpose: A prospective observational multicentre trial was carried out to assess the incidence, pattern, and prognostic factors of radiation-induced emesis (RIE), and to evaluate the use of antiemetic drugs in patients treated with radiotherapy or concomitant radio-chemotherapy. The application in clinical practice of the Multinational Association of Supportive Care in Cancer guidelines was also studied., Materials and Methods: Forty-five Italian radiation oncology centres took part in this trial. The accrual lasted for 3 consecutive weeks and only patients starting radiotherapy or concomitant radio-chemotherapy in this period were enrolled. Evaluation was based on diary card filled in daily by patients during treatment and one week after stopping it. Diary card recorded the intensity of nausea/vomiting and prophylactic/symptomatic antiemetic drug prescriptions., Results: A total of 1020 patients entered into the trial, and 1004 were evaluable. Vomiting and nausea occurred in 11.0% and 27.1% of patients, respectively, and 27.9% patients had both vomiting and nausea. In multifactorial analysis, the only statistically significant patient-related risk factors were concomitant chemotherapy and previous experience of vomiting induced by chemotherapy. Moreover, two radiotherapy-related factors were significant risk factors for RIE, the irradiated site (upper abdomen) and field size (>400 cm(2)). An antiemetic drug was given only to a minority (17%) of patients receiving RT, and the prescriptions were prophylactic in 12.4% and symptomatic in 4.6%. Different compounds and a wide range of doses and schedules were used., Conclusions: These data were similar to those registered in our previous observational trial, and the radiation oncologists' attitude in underestimating RIE and under prescribing antiemetics was confirmed., (Copyright 2009 Elsevier Ireland Ltd. All rights reserved.)