Long-term complications of radiotherapy after breast conservation therapy: investigation of factors affecting the protraction of image findings

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  • 乳房温存術後放射線療法の長期合併症－経年変化に影響を与える因子の検討－

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Abstract

Purpose: The breast after breast conservation therapy (BCT) presents characteristic ultrasound findings, but the course of the change in findings varies from patient to patient. The purpose of this study was to investigate factors affecting the protraction of image findings after BCT. Subjects and Methods: Between 2010 and 2014, we identified 101 breast cancer patients (103 breasts) after BCT. Based on breast ultrasonography performed 18 months after completion of radiotherapy, we evaluated the presence of interstitial fluid collection and skin edema of the diseased side. Furthermore, we evaluated the relationship between those findings and age, BMI, breast size, breast composition, operation method, the extent of resection, and tumor location. Results and Discussion: Twenty-nine cases (28%) showed interstitial fluid collection and 60 cases (58%) showed skin thickening at 18 months after radiation therapy. Skin thickening tended to remain in fatty breast (p=0.041), and also skin thickening tended to remain when the longer axes of resection were 40 mm or more (p=0.041). Interstitial fluid collection tended to remain when the tumor location was the lower region (p=0.006), and skin thickening tended to remain when the tumor location was the outside region (p=0.027). Conclusion: Our data suggested that tumor location affected the protraction of interstitial fluid collection and skin thickening after BCT. Skin thickening tended to remain in fatty breast and when the extent of resection was large.

Journal

  • Choonpa Igaku

    Choonpa Igaku 46 (1), 63-69, 2019

    The Japan Society of Ultrasonics in Medicine

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