Ascaris lumbricoides-induced acute pancreatitis: diagnosis during EUS for a suspected small pancreatic tumor

JOP. 2009 Sep 4;10(5):570-2.


Context: Ascaris lumbricoides is the second most common intestinal parasite world-wide and, although the infection can be asymptomatic, in some cases it can present with complications, such as acute pancreatitis.

Case report: We describe the case of a 37-year-old man, with a history of travelling in Eastern countries who presented with Ascaris lumbricoides-induced acute pancreatitis mimicking a small pancreatic cancer, diagnosed during an upper EUS. The endoscopy revealeda roundworm floating in the duodenum; its endoultrasonographic appearance showed a diffuse inhomogeneous pattern, with hypoechoic echotexture, such as in acute pancreatitis. Microbiological examination of the worm revealed a 20 cm long Ascaris lumbricoides.

Conclusion: In non endemic countries, acute pancreatitis induced by Ascaris lumbricoides is an unusual diagnosis, and should be suspected especially in patients with history of traveling in endemic areas.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Animals
  • Ascariasis / complications*
  • Ascariasis / diagnostic imaging
  • Ascaris lumbricoides / isolation & purification
  • Ascaris lumbricoides / physiology*
  • Diagnosis, Differential
  • Endoscopy, Gastrointestinal
  • Endosonography
  • Humans
  • Intestinal Diseases, Parasitic / diagnostic imaging
  • Male
  • Pancreatic Neoplasms / diagnostic imaging*
  • Pancreatic Neoplasms / pathology
  • Pancreatitis / diagnostic imaging*
  • Pancreatitis / etiology*
  • Tumor Burden
  • Upper Gastrointestinal Tract / diagnostic imaging