Saudi Journal of Gastroenterology

: 2017  |  Volume : 23  |  Issue : 3  |  Page : 209--210

A rare etiology of idiopathic acute pancreatitis

Malay Sharma, Piyush Somani 
 Department of Gastroenterology, Jaswant Rai Speciality Hospital, Saket, Meerut, Uttar Pradesh, India

Correspondence Address:
Malay Sharma
Department of Gastroenterology, Jaswant Rai Speciality Hospital, Saket, Meerut - 250 001, Uttar Pradesh

How to cite this article:
Sharma M, Somani P. A rare etiology of idiopathic acute pancreatitis.Saudi J Gastroenterol 2017;23:209-210

How to cite this URL:
Sharma M, Somani P. A rare etiology of idiopathic acute pancreatitis. Saudi J Gastroenterol [serial online] 2017 [cited 2020 Apr 3 ];23:209-210
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Full Text

A 33-year-old Indian female presented with an episode of acute mild pancreatitis. There was no history of alcohol or drug intake. She was diagnosed as idiopathic acute pancreatitis (IAP) as her blood investigations, ultrasonography, computerized tomography (abdomen), and magnetic resonance cholangiopancreatography were normal. A linear endoscopic ultrasonography (EUS) was performed to determine the etiology of IAP [Figure 1] and [Figure 2].{Figure 1}{Figure 2}


What is the diagnosis?


Linear EUS from the stomach showed linear echogenic structure without acoustic shadow in the pancreatic duct (PD) (“single-tube sign” or “strip sign”) [arrow, [Figure 1]. This linear structure had two hyperechoic linear strips on either side of the longitudinal anechoic lumen representing fluid filled alimentary canal of the worm (“double tube sign” or “inner tube sign”), which confirms the diagnosis of Ascaris Lumbricoides [arrow, [Figure 2] and [Figure 3]. On side-viewing endoscopy, one creamy white worm was seen in the lumen of the duodenum extruding from the papilla [Figure 4]. The worm was removed with biopsy forceps and identified as A. Lumbricoides. Patient underwent treatment with albendazole. On follow-up, EUS revealed normal pancreatic duct.{Figure 3}{Figure 4}

A. lumbricoides (round worm) infestation is endemic in tropical countries. A. lumbricoides is the most common helminthic infection in the world. Most infections by A. lumbricoides are asymptomatic. Although intestine is the normal habitat of adult worm, occasionally these worms migrate to bile duct or PD.[1] PD ascariasis is a rare entity. Abdominal ultrasound has low sensitivity for the diagnosis of PD ascariasis. EUS may be more sensitive for the diagnosis due to high frequency probes and better visualization of pancreas.[2] Pancreatic ascariasis should be considered in IAP particularly in developing nations. Treatment is removal of worms on side-viewing endoscopy if worms are seen extruding from the papilla with dormia basket, rat tooth forceps, or biopsy forceps.[3],[4]Ascaris- induced pancreatitis is generally mild and worm extraction is associated with rapid relief of symptoms.[2]

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Conflicts of interest

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1Sharma M, Somani P. Endoscopic ultrasound of pancreatic duct ascariasis. Dig Endosc 2016;28:483.
2Sharma M, Somasundaram A, Mohan P. Acute pancreatitis: An uncommon but easily treatable cause. Gastroenterology 2011;141:e3-4.
3Sharma M. Echogenic shadow in the common bile duct. Diagnosis: Biliary ascariasis. Gastroenterology 2011;141:e14-5.
4Alam S, Mustafa G, Ahmad N, Khan M. Presentation and endoscopic management of biliary ascariasis. Southeast Asian J Trop Med Public Health 2007;38:631-5.