AUTHOR=Thaweerat Wajana , Dankulchai Pittaya 

TITLE=Case report: Stereotactic MR-guided adaptive radiotherapy for inoperable urothelial carcinoma at the renal pelvis

JOURNAL=Frontiers in Oncology

VOLUME=Volume 13 - 2023

YEAR=2024

URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2023.1284417

DOI=10.3389/fonc.2023.1284417

ISSN=2234-943X

ABSTRACT=We report the case of an 87-year-old female with upper tract urothelial carcinoma at left renal pelvis. She received stereotactic body radiotherapy of 35 Gy in 5 fractions for palliative treatment of hematuria which was delivered by a 1.5 T magnetic resonance (MR) imaging guided linear accelerator. Her symptom was relieved after treatment and post-treatment imaging revealed a complete response of the primary tumor. Thus, this case showed that stereotactic MR-guided radiotherapy could be an appealing option for inoperable patients although radiotherapy is infrequently mentioned in the current treatment guideline of upper tract urothelial carcinoma. Daily adaptive planning from MR images obtained before treatment could result improve the target dose and minimize organs at risk dose. This may lead to a decrease in radiation adverse effects including worsening renal function due to the renal pelvis tumor's proximity to the kidney.