Splenic anisakiasis resulting from a gastric perforation: an unusual occurrence.

We report a case of gastric perforation by Anisakis sp. with consequent localization of the larva in the spleen. An 86-year-old white woman was admitted to our surgical department with a diagnosis of acute abdomen. She had a history of abdominal pain, and her laboratory data showed leukocytosis. In the plain abdominal radiograph, pneumoperitoneum was evident; a computed tomography (CT) scan of the abdomen confirmed the presence of extraluminal air. Anamnesis disclosed the ingestion of raw fish during the week preceding her illness. The patient was underwent emergency laparotomy. A small gastric perforation and a nodular area at the superior pole of the spleen were found. Surgical treatment was performed successfully and consisted of excision of the gastric lesion and splenectomy. The histological diagnosis revealed the presence of gastritis with an ulcer, and in the splenic tissue, some necrotic foci containing cross-sectioned degenerated worms compatible with Anisakis larva.