Journal
CUREUS JOURNAL OF MEDICAL SCIENCE
Volume 10, Issue 3, Pages -Publisher
SPRINGERNATURE
DOI: 10.7759/cureus.2292
Keywords
mr guided radiotherapy; gating; igrt; sbrt; oligometastatic; liver sbrt
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The case of a 73-year-old woman affected by anal canal cancer with concomitant liver metastases is presented here. The patient was addressed to stereotactic body radiotherapy (SBRT) on two hepatic secondary lesions after the first radiochemotherapy treatment of the primary tumor. A Tri-60-Co magnetic resonance hybrid radiotherapy unit was used for SBRT treatment delivery. Both liver lesions were not clearly visible on the setup magnetic resonance imaging (MRI) due to their limited dimensions (maximum diameter 13 mm); however, the presence of two cysts adjacent to the metastases allowed the use of an indirect target gating approach. Treatment was delivered in deep inspiration breath-hold conditions using the visual feedback technique for breathing control optimization. Post radiotherapy imaging assessed the complete response.
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