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Background  Caudate lobe liver metastases occur commonly in patients with neuroendocrine tumors. It is unknown, however, how these lesions respond to regional therapy and how their presence impacts outcomes. We reviewed our experience treating these lesions using transarterial chemoembolization (TACE).    Methods  We reviewed radiographic response to TACE in 86 patients with metastatic neuroendocrine tumors to the liver. We determined the impact of caudate lesions on outcomes in comparison to the cohort of patients without caudate lesions, as well as response of caudate lesions to TACE  versus  lesions elsewhere in the liver.    Results  Caudate lesions were identified in 45 (52%) patients. All patients had disease in other liver segments. Only seven caudate lesions (12.3%) had a radiographic response to TACE, whereas 82% of lesions elsewhere in the liver demonstrated a response. The presence or absence of a caudate lesion did not impact the overall radiographic (82.2%  vs . 82.9%), symptomatic (64.4%  vs . 56.1%), or biochemical (97.6%  vs . 88.9%) response to TACE ( P  > 0.1 for all). However, median overall survival was reduced in those presenting with caudate lesions (87.1  vs . 45.6 months,  P  = 0.031).    Conclusions  Metastatic neuroendocrine tumors to the caudate lobe respond poorly to TACE. Symptomatic or threatening caudate lobe lesions should be considered for palliative resection in spite of additional inoperable liver metastases.

Transarterial chemoembolization is ineffective for neuroendocrine tumors metastatic to the caudate lobe: a single institution review