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Evaluation of radiation treatment volumes for unknown primaries of the head and neck in the era of FDG PET
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Evaluation of radiation treatment volumes for unknown primaries of the head and neck in the era of FDG PET
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Journal Article
Evaluation of radiation treatment volumes for unknown primaries of the head and neck in the era of FDG PET
2020
Overview
Positron-emission tomography (PET) has improved identification of the primary tumor as well as occult nodal burden in cancer of the head and neck. Nevertheless, there are still patients where the primary tumor cannot be located. In these situations, the standard of care is comprehensive head and neck radiation therapy however it is unclear whether this is necessary. This study examines the effects of radiation treatment volume on outcomes among using data from two cancer centers in unknown primary carcinoma of the head and neck.
Patients received unilateral (n = 34), or bilateral radiation (n = 28). Patient factors such as age, gender, smoking history, and patterns of failure were compared using Mann Whitney U and Chi Square. Overall survival (OS) and disease free survival (DFS) trends were estimated using Kaplan-Meier survival curves. Effect of treatment volume on survival was examined using multivariate cox proportional hazard regression model.
No significant differences were observed in the frequency of local (p = 0.32), regional (p = 0.50), or distant (p = 0.76) failures between unilateral and bilateral radiation therapy. By Kaplan-Meier estimates, OS (3-year OS bilateral = 71.67%, unilateral = 77.90%, p = 0.50) and DFS (3-year DFS bilateral = 77.92%, unilateral = 69.43%, p = 0.63) were similar between the two treatment approaches. Lastly, multivariate analysis did not demonstrate any significant differences in outcome by treatment volumes (OS: HR = 0.74, 95% CI: 0.31, 1.81, p = 0.51; DFS: HR: 0.68, 95% CI: 0.24, 1.93, p = 0.47).
Unilateral radiation therapy compared with bilateral produced similar survival.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Aged
/ Cancer
/ Carcinoma, Squamous Cell - diagnosis
/ Carcinoma, Squamous Cell - mortality
/ Carcinoma, Squamous Cell - radiotherapy
/ Carcinoma, Squamous Cell - secondary
/ Female
/ Head
/ Head and Neck Neoplasms - diagnostic imaging
/ Head and Neck Neoplasms - mortality
/ Head and Neck Neoplasms - radiotherapy
/ Head and Neck Neoplasms - secondary
/ Humans
/ Male
/ Medicine
/ Medicine and Health Sciences
/ Neoplasms, Unknown Primary - diagnostic imaging
/ Neoplasms, Unknown Primary - mortality
/ Neoplasms, Unknown Primary - radiotherapy
/ Oncology
/ Positron emission tomography
/ Research and Analysis Methods
/ Survival
/ Tumors
