Overview of recorded variables
| Baseline information | Tumour or cyst specific questions | Treatment characteristics | ||||
| Patient characteristics | Tumour/cyst characteristics* | Solid lesions | Cystic lesions | Intervention | Surgery | Interventional radiology |
| Age | Total number of lesions at baseline | Focal nodular hyperplasia | Simple hepatic cysts | Date of intervention | Type of approach (open, laparoscopic, robot) | Type of procedure (aspiration sclerotherapy, TAE, RFA/MWA) |
| Sex | Location of lesion (left hemiliver, right hemiliver, bilobar) | Haemangioma | Mucinous cystic neoplasms | Duration of hospital stay | Occurrence and reason for conversion | Sclerotherapy (volume of aspiration, length of sclerosing, type of sclerosing agent) |
| Mortality If yes, reason | Type of lesion | Hepatocellular adenoma | Intraductal papillary neoplasms | Operation or procedure time | Type of procedure (fenestration, wedge resection, segmental resection, hemihepatectomy, transplantation) | TAE (volume and type of embolisation agent(simple embolisation, chemo-embolisation or lipiodolisation)) |
| Comorbidity (ASA score and Elixhauser comorbidity index) | Diameter, date and modality of diagnosis | 30-day and 90-day mortality | Specification of resected segments | |||
| Diameter, date and modality of follow-up | Amount of blood loss | |||||
| Occurrence of misdiagnosis If so, revised diagnosis and diagnostic modality | Additional procedures (eg, argon beam coagulation, omental transposition, concurring cholecystectomy) | |||||
| Histopathological diagnosis with immunohistochemistry if available | Complications (type, CD, CCI and SIR) | |||||
*According to RECIST V.1.1 criteria, lesions will only be measured on CT or MRI (longest diameter), measured on the transversal plane on post-contrast series. Maximum of two lesions. If the target lesion is not visible on follow-up imaging (index imaging is imaging shortest before inclusion), then the diameter of the next largest tumour will be measured.
ASA, American Society of Anesthesiologists; CCI, comprehensive complication index; CD, Clavien-Dindo; MWA, microwave ablation; RFA, radiofrequency ablation; SIR, society of interventional radiologists classification for adverse events; TAE, transarterial embolisation.