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Leo Baxendale-Smith Department of Medical Oncology, Edinburgh Cancer Centre, Western General Hospital, Crewe Road, South, Edinburgh, United Kingdom

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Karim El-Shakankery Department of Medical Oncology, Edinburgh Cancer Centre, Western General Hospital, Crewe Road, South, Edinburgh, United Kingdom

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James Gordon-Smith Department of Interventional Radiology, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom

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Lucy Wall Department of Medical Oncology, Edinburgh Cancer Centre, Western General Hospital, Crewe Road, South, Edinburgh, United Kingdom

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Selective internal radiation therapy (SIRT) is a novel intervention for both primary and metastatic malignant liver lesions. Adrenocortical carcinoma (ACC) is rare with limited treatment options; evidence for SIRT in ACC liver metastases consists of case reports only. Selective internal radiation therapy (SIRT) was employed to treat recurrent liver metastases in a 49-year-old gentleman with ACC, who previously underwent a left-sided hepatectomy. The patient opted for SIRT after reviewing the literature regarding mitotane chemotherapy and its toxicities. Selective internal radiation therapy (SIRT) provided several months of progression-free survival (PFS), with no toxicity and an excellent radiological response. The patient re-presented 12 years after the initial diagnosis with skeletal metastases and sadly died in September 2022. Substantial unmet need exists for effective treatments in ACC, with 75% of patients presenting with incurable disease. Developing widespread disease, SIRT offered 2 years’ PFS in our patient; this was well tolerated with minimal residual liver impairment. Its use in ACC liver-limited disease warrants investigation.

Significance statement

Adrenocortical carcinoma (ACC) is a rare and aggressive tumour with limited treatments. Once metastatic disease develops, existing standard-of-care treatments offer a dismal overall survival, alongside marked toxicities. Selective internal radiation therapy (SIRT) may represent a new intervention in the treatment paradigm for liver-limited, metastatic ACC. Here, we present the case of a patient treated with multiple rounds of SIRT for relapsed, liver-limited ACC, prolonging survival by several years. Recurrent SIRT led to maintained liver function and no toxicities. Little evidence outlines its use in ACC but further study is certainly warranted to ascertain the value of SIRT, considering the limited treatment landscape that currently exists.

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