case report spontaneous cholecystocolic fistula and locoregional liver tumour ablation a cautionary tale a liver abscess is a feared and potentially fatal complication following transarterial chemoembolisation tace and radiofrequency ablation rfa of liver tumours iatrogenic bilioenteric communications such as bilioenteric anastomosis sphincterotomy and biliary stents are considered major risk factors and are due to bacterial colonisation of the biliary tree with enteric flora naturally occurring spontaneous cholecystoenteric fistula poses a similar risk as its iatrogenic counterparts but is rarely described in the literature we present a case where abscess formation complicated a combined tace and rfa in an unrecognised cholecystocolic fistula