Background & objectives : There is limited information available on the temporal course of late stage radiotherapy adverse effects. The present study reports on the temporal course of late toxicities after chemoradiation and brachytherapy. Methods : Women with cervical cancer who presented with late toxicity after (chemo) radiation were included in the study. Grade of toxicity (Clinical Toxicity Criteria for Adverse Events version 4.03) and type of intervention were recorded at three-monthly interval for the first year and then six monthly until 24 months. Direct cost for the management of toxicity was calculated. Univariate analysis was performed to understand the impact of various factors on persistence of toxicity. Results : Ninety two patients were included in this study. Grades I, II, III and IV toxicities were observed in 50 (54%), 33 (36%), 7 (8%) and 2 (2%) patients, respectively, at first reporting. Patients spent a median of 12 (3-27) months with toxicity. At 12 months, 48/92 (52.2%) patients had a complete resolution of toxicity, whereas 27/92 (29.3%) patients had low grade (I-II) persistent toxicity. Only 6/92 (6.5%) patients who had grade III−IV toxicity had resolution to a lower grade. Four (4.3%) patients died due to toxicity. At 24 months, 9 (10%) patients continued to have grade ≥ III toxicity. On an average, 7 (2-24) interventions were required for the clinical management of late toxicity and median direct cost incurred was ₹ 50,625 (1,125-303,750). Interpretation & conclusions : In this study late radiation toxicity resolved within 12 months in more than half of patients. However, others are likely to have had persistent lower grade toxicity or progression to higher grade. Structured strategies are hence needed for the effective management of late toxicities.
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