Comparative Analysis of External and Internal Radiotherapy- Dependent Plans in Patients with Gynecological Cancer.

Autor:	Vourtsas P; Department of Radiation Oncology, Medical School, University of Patras, Patras, Greece., Sarris K; Department of Radiotherapy, Hygeia Hospital, Athens, Greece., Giakoumakis N; Department of Medical Physics, Hygeia Hospital, Athens, Greece., Kolitsi G; Department of Radiotherapy, Hygeia Hospital, Athens, Greece., Kyprianou K; Department of Radiotherapy, Hygeia Hospital, Athens, Greece., Mastronikoli S; Brighton and Sussex Medical School, Brighton, U.K., Tsiambas E; Department of Cytopathology, 417 Army Equity Fund Hospital, Athens, Greece., Peschos D; Department of Physiology, Medical School, University of Ioannina, Ioannina, Greece., Kardamakis D; Department of Radiation Oncology, Medical School, University of Patras, Patras, Greece., Androutsopoulos G; Department of Obstetrics and Gynecology, Medical School, University of Patras, Patras, Greece., Spyropoulou D; Department of Radiation Oncology, Medical School, University of Patras, Patras, Greece.
Jazyk:	angličtina
Zdroj:	Cancer diagnosis & prognosis [Cancer Diagn Progn] 2024 May 03; Vol. 4 (3), pp. 352-358. Date of Electronic Publication: 2024 May 03 (Print Publication: 2024).
DOI:	10.21873/cdp.10331
Abstrakt:	Background/aim: Radiotherapy plays a key role in the treatment of gynecological cancer. Modern radiotherapy techniques with external beams (e-RT) are applied in a broad spectrum of gynecological cancer cases. However, high radiation doses, affecting normal tissue adjacent to cancer, represent the main disadvantage of e-RT regimens. For this reason, brachytherapy (BT), an internal beam-based technique (i-RT), is suggested following e-RT. Our purpose was to compare e-RT plans using volumetric-modulated arc therapy (VMAT) with those using 3D conformal techniques (3D-CRT) and compare BT plans guided by 3D or 2D imaging based on the potential corresponding toxicity levels. Materials and Methods: In this preliminary, non-randomized comparative retrospective study, 15 females suffering gynecological cancer were enrolled. Modern e-RT and i-RT (BT) techniques were applied. Results: Concerning e-RT, D95/D99/rectum 2cc/bladder 2cc and small intestine 2cc were measured and compared; in i-RT, rectum 2cc/bladder 2cc were measured and compared. The median dose to the planning target volume in VMAT was 97.4 Gy compared with 92.9 Gy in 3D-CRT. Τhe rectum received almost 5 Gy less in VMAT compared to 3D-CRT (median of 43.5 Gy vs. 48.6 Gy; p=0.001). In the bladder, dose differences were minimal, while the small intestine received 47.6 Gy in VMAT (p=0.001). Regarding 3D-BT, the rectum received 63.1 Gy compared with 49.9 Gy (p=0.009) in 2D-BT. Concerning the bladder, mean 2D-BT and 3D-BT doses were 71.9 and 65 Gy, respectively, differing non-significantly. Conclusion: VMAT was found to be superior to 3D-CRT, especially in dose distribution, volume coverage and protection of critical organs. Similarly, 3D-BT should be preferred over 2D-BT due to critical advantages. Competing Interests: The Authors have no conflicts of interest to declare in relation to this study. (Copyright 2024, International Institute of Anticancer Research.)
Databáze:	MEDLINE
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