Ultrasound in the diagnosis of gallbladder ascariasis

Fı̀lice, Carlo; Marchi, Lorenzo De; Meloni, C; Patruno, S. F. A.; Capellini, R.; Bruno, Raffaele

doi:10.1007/bf00203363

Cited by 17 publications

(10 citation statements)

References 11 publications

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“…The worm has 2 outer coverings, the cuticle and hypodermis; an inner layer contains many contractile muscles with a central alimentary tube. 2 Features of Ascaris seen on ultrasonography of the gallbladder, 3,4 common bile duct, [5][6][7] and pancreatic duct [8][9][10] and on conventional radiology and computed tomography have been described in the past. [11][12][13][14] On ultrasonography of the fluid-filled small intestine, Ascaris has been described as a "winding highway" or "parallel lines."…”

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confidence: 99%

Ultrasonographic appearance of Ascaris lumbricoides in the small bowel.

Mahmood¹,

Mansoor²,

Quraishy³

et al. 2001

J of Ultrasound Medicine

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Roundworm infestation, one of the most common helminthic diseases worldwide, is caused by Ascaris lumbricoides, one of the largest parasites that infests the human bowel. A lumbricoides is virtually universal at some stage of childhood in semitropical and tropical regions. This study describes our experience with the ultrasonographic appearance of intestinal ascariasis in 84 patients, 2.5 to 42 years of age, examined over 2 years beginning October 1997. The patients' conditions ranged from acute intestinal obstruction to no clinical features pertaining to obstruction. Ultrasonographic examination was performed with an Echocee power Doppler real-time unit with a variable-frequency 3.7-MHz convex, 7.5-MHz linear probe. In longitudinal section the Ascaris worm presented as a linear intraluminal mass with 3 or 4 linear echogenic interfaces; in the cross section, it was round, sometimes appearing as a "target" sign. Some worms also showed serpentine movements. Sonographic examination of the patients in the left lateral decubitus position after ingestion of water improved detection and visualization of the worms in some cases. It is concluded that A lumbricoides in the small bowel has a sonographic appearance that can be recognized by the wary observer.

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confidence: 99%

Ultrasonographic appearance of Ascaris lumbricoides in the small bowel.

Mahmood¹,

Mansoor²,

Quraishy³

et al. 2001

J of Ultrasound Medicine

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“…Hepatobiliary ascariasis is more common now than in the past, maybe because of the more frequent use of ultrasonography and endoscopic diagnostic procedures in the clinical practice. 5,9,11 Sonographic findings included a non-shadowing, long, echogenic structure in the form of a coil, an echogenic strip with central anechoic tube, an echogenic structure extending across the gallbladder giving it a septate appearance, and characteristic erratic, non-directional, zigzag movements of these echogenic struc- Computed tomographic scanning 10,12 and magnetic resonance imaging (MRI) 19 may also be used to identify worm(s) in the liver or bile ducts but this is not usually necessary. Ultrasonography promptly shows worm's movement in the biliary tree and this is an important advantage of US over CT and MRI.…”

Section: Discussionmentioning

confidence: 99%

An alien in the gallbladder. A rare case of biliary ascariasis in an Italian emergency department

et al. 2016

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Ascariasis is a common infection in many developing countries. The prevalence of ascariasis is related to poverty, poor hygienic and sanitary conditions. The adult form of Ascaris lumbricoides usually resides in the human intestinal lumen (more frequently in the jejunum and middle ileum) and does not cause symptoms. However, it can occasionally cause severe complications such as intestinal obstruction or perforation peritonitis. Its migration into the biliary tract is not uncommon but gallbladder involvement is very rare. Abdominal ultrasonography is essential to detect the presence of this parasite. In this article, we describe the radiologic findings, clinical manifestations and successful medical treatment of a patient with gallbladder ascariasis diagnosed in an emergency setting.

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“…The worms present as a linear echogenic image without acoustic shadow in the lumen of the gallbladder and common bile duct (6,7). The findings of erratic, non-directional, zigzag movements are characteristic of a live worm (8).…”

Section: Discussionmentioning

confidence: 99%