Radiological aspects about a little-know parasitosis: hydatidosis.

This poster is published under an open license. Please read the disclaimer for further details.

Congress:

ECR 2015

Poster Number:

C-0793

Type:

Educational Exhibit

Keywords:

Parasites, Infection, Cysts, eLearning, Education, MR, CT, Conventional radiography, Musculoskeletal bone, Liver, Abdomen

Authors:

R. Gil, A. Llanes Rivada, S. Flores Casaperalta, M. Rengel Ruiz, C. Parrilla Muñoz, M. J. Moreno, M. Rausell; Valencia/ES

DOI:

10.1594/ecr2015/C-0793

DOI-Link:

https://dx.doi.org/10.1594/ecr2015/C-0793

Fig. 1: US shows an hydatid cyst type 1: Unilocular lesion with internal echoes...

Fig. 2: Contrast-enhanced CT shows an hydatid cyst occupying almost the entire hepatic...

Fig. 4: US shows an hypoechoic and heterogeneous liver lesion with wall calcifications....

Fig. 6: Contrast-enhanced CT demostrates a liver hydatid cyst (segment VII) with...

Learning objectives

After reviewing this exhibition, the radiologist should become more familiar with hydatid disease and its multiple imaging appearances and will be able to identifythe typical radiographic features.

Background

Hydatidosis is a parasitic infection which is spread worldwide and iscaused by Echinococcus granulosus and rarely by Echinococcus multilocularis. Humans are an accidentaldeadendintermediate hosts for the parasite who can acquire the disease ingesting contaminated food or handling sick animals. The diagnosis requires inmunological test and imaging techniques which usually confirm the clinical suspicion.

Findings and procedure details

We retrospectively reviewed the patients with proven hydatid disease between 2009-2014in our institution. From a total of 52 patients, we selected the images that bestdefined the typical features of the disease, in order to describe radiological findings. Hydatid cysts are most commonly found in liver (up to 80% of the cases) followed by lungs. Echinococcal disease in other unusual locations can be a diagnosticchallenge. The WHO / IWG classification proposed by WHO in 2013 (World Health Organization Informal Working Group who/ IWG)guides us about the...

Conclusion

Hydatidosis is a dynamic entity whose manifestations are different depending on several factors such as the lesion evolutionary stage, the presence of complications and theaffected organ. The echinococcal disease in unusual locations can be difficult to diagnose. Radiologists should be able to recognize it and bear hydatidosis en mind in cysticlesions in any location of the body, especially in patients from endemic areas. Imaging tests are useful for diagnosis, surgery planning and followup.

Personal information

References

Polat P, Kantarci M, Alper F et al. Hydatid Disease from Head to Toe. Radiographics 2003; 23; 475-494 WHO Informal Working Group. International classification of ultrasound images in cystic echinococcosis for application in clinical and field epidemiological settings. Acta Trop 2003; 85: 253-261. Durgun V, Kapan S, Kapan M, Karabicak I, Aydogan F, Goksoy E. Primary splenic hydatidosis. Dig Surg 2003; 20:38–41. Pedrosa I, Saíz A, Aráosla J et al. Hydatid Disease: Radiologic and PathologicFeatures and Complications. Radiographics 2000; 20;795-817. Sánchez Oro, J.L. León Guijarro,...