The Promising Treatment Schedule of Concurrent Chemoradiotherapy for Stage III Non-small Cell Lung Cancer: Alternative for Conventional Fractionation Using Mathematical Analysis.

Abstract

BACKGROUND/AIM:

To evaluate treatment schedules involving concurrent chemoradiotherapy in stage III non-small cell lung cancer (NSCLC) using the tumor control probability (TCP) and normal tissue complication probability (NTCP) parameters.

PATIENTS AND METHODS:

The standard schedules were compared with two types of schedules, the dose escalation and the short-term schedules. Standard schedules were 60-74 Gy in 30-37 fractions. The dose escalation schedules with hypofractionation and hyperfractionation were 69 Gy in 30 fractions and 69.6 Gy in 58 fractions, respectively, twice per day (b.i.d). The short-term schedules were concomitant boost, 64 Gy in 40 fractions b.i.d. and the accelerated radiotherapy schedule, 57.6 Gy in 36 fractions, three fractions per day (t.i.d).

RESULTS:

The average TCP for the short-term schedules was more than 16% in two tumor models; however, the TCP for standard and dose escalation schedules was less than 5%. In each organ, the increase in NTCP for the short-term schedule compared with standard schedules was less than 15%.

CONCLUSION:

The short-term schedules had an advantage over standard schedules for NSCLC.

• Authors: Yoshihiro Ueda, Osamu Suzuki, Shingo Ohira, Masashi Yagi, Iori Sumida, Kentaro Wada, Shoki Inui, Masaru Isono, Masayoshi Miyazaki, Kazuhiko Ogawa, Teruki Teshima
• Journal: Anticancer research (Anticancer Res) Vol. 40 Issue 7 Pg. 4095-4104 (Jul 2020) ISSN: 1791-7530 [Electronic] Greece
• PMID: 32620658 (Publication Type: Journal Article)
• Copyright: Copyright© 2020, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved.

Topics

• Algorithms
• Carcinoma, Non-Small-Cell Lung (pathology, therapy)
• Chemoradiotherapy (methods)
• Dose Fractionation, Radiation
• Humans
• Lung Neoplasms (pathology, therapy)
• Neoplasm Staging