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• W4387206961 abstract "Radiation toxicity to the bulboclitoris has not been previously investigated. This retrospective cohort study aims to report sexual side effects of patients who underwent radiotherapy for tumors involving the lower vagina, periurethra, and bulboclitoris (BC).Patients treated between 2017- 2022 for gynecologic cancer involving the low vagina were included. The high-risk clinical target volume (HR-CTV), bladder, rectum, and urethra were contoured on patient imaging during initial treatment planning. The BC was retrospectively contoured using T2 MRI sequences fused to the pre-treatment and brachytherapy CT simulation. Superiorly, the BC was defined as inferior to the pubic symphysis and attached to the suspensory ligament of the clitoris. Laterally, the crura extend on either side of the corpus. Inferiorly, the vestibular bulbs flank the urethra and vagina on either side, extending posteriorly to mid-vagina. Dosimetric data for the BC, vaginal morbidity using the CTCAE 4.0 for vaginal stenosis, and pain scoring of the BC were obtained via chart review.Patients underwent external beam radiotherapy (IMRT) to the pelvis and bilateral inguinal region (45 Gy in 25 fractions) followed by High Dose Rate Ir-192 interstitial brachytherapy in 5 fractions for a total dose of 25 Gy (22.5 - 27.5 Gy). Patients had a median age of 65 years (49-73) with tumors located in the lower vagina, near the BC and urethra. At the time of brachytherapy, in order to cover the HR-CTV, interstitial brachytherapy needles were placed within the BC structure with 58% (33% - 77%) of total interstitial needles placed within the bulbs of the BC. The mean pre-treatment volume of the BC was 16.6 cc (11.9 - 20.9 cc) and at brachytherapy was 12.66 cc (7.3 - 22.1 cc) with Table 1 summarizing radiation doses. At a median follow up of 19.6 months, all patients had a complete local response, with one patient deceased of metastatic disease. In the acute period, all patients reported severe pain in the clitoral glans region and dysuria that completely resolved after 2 years. Grade 1-2 vaginal stenosis occurred in all patients despite vaginal dilator usage. One patient reported decreased clitoral sensitivity and inability to achieve clitoral-mediated orgasm 5 months after radiotherapy.This study demonstrates that the BC receives a significant radiation dose during vaginal brachytherapy treatment which can cause clitoral pain and dysfunction. Further studies are needed to evaluate the dose response of the BC as well as explore methods to spare the organ during radiation therapy in order to minimize toxicity and preserve sexual function." @default.
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• W4387206961 date "2023-10-01" @default.
• W4387206961 modified "2023-10-04" @default.
• W4387206961 title "Evaluation of Sexual Side Effects in Patients after Chemoradiation and Brachytherapy for Gynecologic Cancers Involving the Lower Vagina and Bulboclitoris" @default.
• W4387206961 doi "https://doi.org/10.1016/j.ijrobp.2023.06.1856" @default.
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