Comparison of Functional Organ Preservation by Concomitant Boost Radiotherapy Versus Concurrent Chemoradiation in Locally Advanced Carcinoma of Larynx or Hypopharynx: A Prospective Randomized Study

Abstract

Functional organ preservation is a major challenge in management of advanced laryngeal and hypopharyngeal carcinoma. Although ideal approach is a subject of much debate, radiotherapy with or without chemotherapy is most commonly used modality. This randomized study was conducted to compare functional organ preservation by chemoradiation (CRT) versus concomitant boost radiotherapy (CBRT). A total of 40 patients with advanced (stage III/stage IVa) laryngeal and hypopharyngeal cancer were randomized to receive either CRT (n = 20) to a dose of 66 Gy in 33 fractions over 6.5 weeks with concurrent cisplatin (100 mg/m² on days 1, 22 and 43) or CBRT (n = 20) to a dose of 67.5 Gy in 40 fractions over 5 weeks. Patients were assessed for organ preservation rate, toxicities, voice and swallowing functions utilizing Voice Related Quality of Life (VRQOL) and MD Anderson Dysphagia Inventory (MDADI) scores, respectively, for minimum follow up of 6 months. Organ preservation rate (intact disease free larynx) at 6 months post treatment was observed in 100% in CRT arm and 95% in CBRT arm. There was no significant difference in mucositis and dermatitis in two arms (p = 0.82 and 0.78, respectively). Dysphagia was observed more in CRT arm (n = 12 vs n = 6). Late toxicities grade 3 xerostomia, grade 2 dysguesia, were seen significantly more in CRT arm. There was no statistical difference between the two arms in terms of VRQOL (p = 0.55) and MDADI scores (p = 0.13). In CRT arm 13 patients complete response and in CBRT arm 12 patients had complete response. Accelerated fractionation with concomitant boost schedule is as effective as CRT in anatomical and functional preservation of larynx. The toxicities, voice and dysphagia related quality of life is comparable.

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