<p>A pseudoaneurysm is a rare and potentially dangerous vascular complication of acute pancreatitis, with a mortality of 20–43% in untreated patients. Its treatment includes embolization or surgical resection. A clinical case of a 39-year-old patient, with a history of chronic pancreatitis, pseudocyst of the tail of the pancreas, as well as a false aneurysm of the splenic artery detected by means of computed tomography of abdominal organs with contrast is presented. A two-stage surgical procedure was performed. The patient was discharged in a satisfactory condition. This case shows a successful use of diagnostic techniques, as well as a stage-by-stage approach to surgical treatment of this pathology.</p><p>Received 20 April 2017. Accepted 7 June 2017.</p><p><strong>Funding:</strong> The study did not have sponsorship.</p><p><strong>Conflict of interest:</strong> Authors declare no conflict of interest.</p><p><strong>Author contributions</strong><br />Conception and study design: I.V. Halturin<br />Data collection and analysis: I.V. Halturin<br />Drafting the article: I.V. Halturin<br />Resources: I.V. Halturin, S.A. Sergeev, R.G. Achmetzyanov <br />Critical revision of the article: S.A. Sergeev, R.G. Achmetzyanov<br />Final approval of the version to be published: I.V. Halturin, S.A. Sergeev, R.G. Achmetzyanov</p>