Dosimetric impact of edema on inguinal lymph node boost in locally advanced vulvar cancer

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We aimed to evaluate the extent of groin edema and its dosimetric effect in boosted inguinal lymph nodes (LN) for vulvar cancer patients. The level of edema was determined in 10 patients treated with radical radiotherapy. A dosimetric evaluation of six LNs in the patient with the maximum level of edema was performed. The accumulated dose across CBCT fractions was acceptable for all six LNs (>94% of prescribed dose) even with the development of up to 13 mm of edema. The major contributor to fractional dose degradation was geographical displacement of the nodes. We suggest evaluation of edema on daily CBCT.

Original languageEnglish
JournalJournal of Applied Clinical Medical Physics
Publication statusAccepted/In press - 2021

Bibliographical note

Publisher Copyright:
© 2021 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals LLC on behalf of American Association of Physicists in Medicine

    Research areas

  • cancer vulva, daily CBCT, groin edema, image guided radiotherapy, inguinal lymph node boost, VMAT

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