Hepatocellular carcinoma (HCC) is the fourth most common cause of cancer-related death worldwide. Tumor recurrence mainly accounts for reduced long-term survival. The 5-year recurrence rate following primary resection ranges from 40 to 70%, and up to 95% of recurrences are intrahepatic [1,2]. Therefore, a strict radiological follow-up is essential to identify early-stage recurrences amenable to a second curative intended treatment. Several treatment options may be considered, which include repeat hepatectomy (RH), salvage liver transplant (SLT), and radiofrequency ablation (RFA). The best treatment option for recurrent HCC is currently debated, and selection criteria may vary between centers. Although there are recognized international guidelines for the management of primary HCC, similar guidelines still need to be implemented for recurrent HCC (Table 18.1) [3][4][5][6].
Types and Mechanisms of Hepatocellular Carcinoma RecurrenceIntrahepatic recurrences are ascribed to two distinct mechanisms. The first is de novo carcinogenesis in the remaining liver, which results in multicentric occurrence (MO). However, most recurrences are due to intrahepatic metastases (IM) originating from the same cell lineage of the primary cancer [3]. According to recent research, IM seems to be driven by either local dissemination of the tumor through