Publications by authors named "Avipsa Das"

3 Publications

  • Page 1 of 1

Radiation-induced hypothyroidism in patients of oral squamous cell carcinoma: A retrospective analysis of 195 patients.

Indian J Cancer 2021 Jan 27. Epub 2021 Jan 27.

Department of Head and Neck Surgery, Tata Medical Center, Kolkata, West Bengal, India.

Background: Radiation-induced hypothyroidism (RIH) is common after neck irradiation, and biochemical evaluation of thyroid function is recommended periodically for early diagnosis and treatment. This study aimed to evaluate the predictors of RIH after completion of adjuvant radiotherapy (RT) for primary oral squamous cell carcinoma (OSCC).

Methods: This is a retrospective study involving 195 patients who received RT after surgery for OSCC between August 2011 and December 2016. Thyroid function tests were obtained every 6 months and patients were considered to be hypothyroid if thyroid-stimulating hormone level was >5 mIU/mL.

Results: The study cohort comprised 130 men with a median age of 52 years (range 21-77 years). About 107 (54.87%) patients developed hypothyroidism, with a median of 21 months (range 2-67 months) for the development of RIH. Women [41 (63.1%) versus 66 (50.8%), p=0.035], addition of chemotherapy [36 (63.2%) versus 71 (51.4%), p= 0.019], and higher cumulative dose to the thyroid gland (median dose 4690 cGy versus 2981 cGy, P < 0.001) resulted in higher incidence of RIH on univariate analysis. On multivariate Cox regression analysis, female sex (P = 0.042), bilateral irradiation (P = 0.046), and cumulative dose to the thyroid (P = 0.001) were factors associated with increased risk of developing RIH.

Conclusion: The addition of chemotherapy, high dose of radiation to the thyroid gland, bilateral irradiation, and female sex were at higher risk of developing RIH. However, more studies are required to identify the dose-volume constraints of the thyroid gland.
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January 2021

A comparison of six fractions per week chemoradiation versus five fractions per week of conventional chemoradiation in carcinoma cervix: A prospective controlled study.

J Cancer Res Ther 2019 Oct-Dec;15(6):1296-1303

Department of Radiotherapy and Radiation Medicine, Banaras Hindu University, Varanasi, Uttar Pradesh, India.

Aims: The standard of care for carcinoma cervix stage IB2-IVA is five fractions per week of radiotherapy (RT) with concurrent cisplatin. We compared the standard treatment with six fractions per week of RT with concurrent Cisplatin to see whether the later had improved survival outcomes with comparable toxicities.

Settings And Design: 46 patients of carcinoma cervix with stage IB2-IVAwere randomized into two arms.

Materials And Methods: Study arm: 46 Gy/23 fractions/26 days, 6 fractions/week with injection CDDP 40 mg/m and Control arm: 46 Gy/23 fractions/31 days, 5 fractions/week with injection Cisplatin 40mg/m. Patients in both the arms received LDR brachytherapy to a dose of 29 Gy at point A.

Statistical Analysis Used: The primary end points were disease-free survival (DFS) and overall survival (OS). Compliance to treatment and treatment toxicities were the secondary end points. P value ≤0.05 were considered significant.

Results: The study was carried out during June, 2014-April, 2015. Statistical analysis was done in May, 2019. Of 46 patients, 39 patients completed the treatment. The study and control arms had 17 and 22 patients, respectively. Median follow-up period is 45 months (range: 1-54 months). 3-year DFS rates and OS was 69.5% vs. 72.7% (P = 0.73) and 63% vs. 68% (P = 0.45) in study and in control arm, respectively. There was no significant difference in acute and late radiation toxicities between two arms.

Conclusion: Chemoradiotherapy with six fractions per week seems feasible and equally efficacious in terms of survival outcomes and toxicity profile. Further prospective randomized controlled study is required to prove the merit of altered fractionation with concurrent cisplatin.
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May 2020

Radical radiotherapy or chemoradiotherapy for inoperable, locally advanced, non-small cell lung cancer: Analysis of patient profile, treatment approaches, and outcomes for 213 patients at a tertiary cancer center.

Indian J Cancer 2018 Apr-Jun;55(2):125-133

Department of Radiation Oncology, Tata Medical Center, Kolkata, West Bengal, India.

Introduction: Radical radiotherapy (RT) with curative intent, with or without chemotherapy, is the standard treatment for inoperable, locally advanced nonsmall cell lung cancer (NSCLC).

Materials And Methods: We retrospectively reviewed the data for all 288 patients who presented with inoperable, locally advanced NSCLC at our institution, between May 2011 and December 2016.

Results: RT alone or sequential chemoradiotherapy (SCRT) or concurrent chemoradiotherapy (CCRT) was used for 213 patients. Median age was 64 years (range: 27-88 years). Stage-III was the biggest stage group with 189 (88.7%) patients. Most patients with performance status (PS) 0 or 1 received CCRT, whereas most patients with PS 2 received RT alone (P < 0.001). CCRT, SCRT, and RT alone were used for 120 (56.3%), 24 (11.3%), and 69 (32.4%) patients, respectively. A third of all patients (32.4%) required either volumetric-modulated arc radiotherapy (VMAT) or tomotherapy. Median follow-up was 16 months. The median progression-free survival and median overall survival (OS) were 11 and 20 months, respectively. One-year OS and 2-year OS were 67.9% and 40.7%, respectively. Patients treated using CCRT lived significantly longer with a median survival of 28 months, compared with 13 months using SCRT and RT alone (P < 0.001). On multivariate analysis, OS was significantly affected by age, stage group, treatment approach, and response to treatment.

Conclusion: RT including CCRT is feasible, safe, and well tolerated in our patient population and results in survival benefits comparable with published literature. CCRT should be considered for all patients with inoperable, locally advanced NSCLC, who are fit and have good PS.
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April 2019