Hepatic Anisakiasis Presented as a Suspected Metastatic Cancer

Anisakiasis is a zoonotic disease caused by ingesting nematode larvae found in raw seafood dishes such as sushi, sashimi, ceviche, and marinated herring. While it primarily affects the digestive tract, cases outside have been reported. We present the case of a young Spanish patient who arrived at the emergency department with abdominal pain and fever. A thoraco-abdominopelvic CT scan revealed irregular thickening of the gastric wall, suspected to be a lesion, along with multiple hepatic lesions suggestive of secondary appearances and nodules in the greater omentum, indicative of peritoneal carcinomatosis. This case details a rare instance of hepatic anisakiasis initially mistaken for metastatic cancer, underscoring the importance of considering hepatic anisakiasis as a differential diagnosis in patients with diets rich in raw fish. Patient consent was obtained for the publication of this case.