Spilled Gallstone Abscesses Mimicking Liver Metastases

We present a unique case highlighting the difficulty relating to the specificity of CT-PET following a case where gallstone abscess mimicked colorectal liver metastases. CT-PET is often used in the diagnostic work-up of patients with colorectal liver metastatic disease; aiding staging and patient management. However, care must be taken in the interpretation of ‘hot spots’ and must be considered along with clinical history and the other imaging modalities used. This case highlights that the interpretation of imaging modalities can overcall the diagnosis in patients with presumed colorectal liver metastases.