Sharma, U KRauniyar, R KBhatta, N2009-05-282009-05-282005-01-13Sharma UK, Rauniyar RK, Bhatta N. Roundworm infestation presenting as acute abdomen in four cases--sonographic diagnosis. Kathmandu University Medical Journal. 2005 Jan-Mar; 3(1): 87-90http://imsear.searo.who.int/handle/123456789/46241Kathmandu University Medical Journal.Infestation with Ascaris lumbricoides (roundworm) is very common in the tropics and subtropics. Patients with ascariasis can be asymptomatic or may present with different clinical features in the form of simple nausea, decreased appetite, abdominal pain or more severe bowel obstruction, perforation, intussusception, biliary colic etc. Ultrasonography (USG) can be quick, safe, noninvasive and relatively inexpensive tool in diagnosing the presence of worms and also evaluating response to treatment (1, 2, and 3). Here we present four cases of roundworm infestation presenting with acute abdomen in the emergency department, which were diagnosed by USG and further imaging features of ascariasis on USG is described.engAbdomen, Acute --parasitologyAdolescentAdultAnimalsAscariasis --complicationsAscaris lumbricoidesBile Duct Diseases --parasitologyCholecystitis, Acute --parasitologyFemaleHumansIntestinal Diseases --parasitologyLiver Abscess --parasitologyMiddle AgedCase Reports