• Atlgan Tolga Akcam, Abdullah Ulku, Ismail Soner Koltas, Volkan Izol, Omer Sunkar Bicer, Emine Kilicbagir, Gurhan Sakman, Hakan Poyrazoglu, Tahsin Erman, Ibrahim Atilla Aridogan, Cem Kaan Parsak, Mehmet Inal, and Serdar Iskit.
• Ismail Soner Koltas, PhD, Department of Parasitology,, Cukurova University, Balcali,, Adana 01330, Turkey, T: +903223386060 F: +903223386572, koltas@cu.edu.tr.
• Ann Saudi Med. 2014 Nov 1; 34 (6): 508516508-16.

Background And ObjectivesThe incidence of primary extrahepatic cystic echinococcosis (CE) is rare. Generally, radiological and serological findings can help establish the diagnosis of hepatic and pulmonary CE, but a CE in an unusual location with atypical radiological findings may complicate the differential diagnosis. The objective of this study is to present the characteristics of cases with extrahepatic CE in respect of sites of involvement, clinical presentations, radiological findings, serological diagnostic evaluations, and outcomes of infected patients.Design And SettingsA retrospective analysis of surgically treated CE was conducted between January 1993 and January 2014 in the General Surgery, Pediatric Surgery, Urology, Cardiovascular Surgery, Neurosurgery, and Orthopedics departments of University of Cukurova, Faculty of Medicine, Balcal Hospital.Patients And MethodsAmong the 661 patients managed for CE, 134 had unusual sites of involvement. Radiological and serological examinations were used to differentiate CE from alveolar echinococcosis.ResultsOf 134 cases with unusual sites of involvement, 32 cases had liver CE (23.9%), 7 cases had lung CE (5.2%), and 2 cases had concomitant liver and lung CE (1.5%). In 93 (69.4%) cases, unusual organ involvement was isolated without any liver or lung involvement. The mean age was 45 years. Abdominal pain was the main symptom and was found in 104 patients. Thirty-one (23.1%) of 134 extrahepatic CE cases were evaluated as negative with indirect hemagglutination (IHA). However, positive results were obtained in 54 cases evaluated with Echinococcus granulosus IgG Western blot (WB), including 10 IHA-negative cases.ConclusionCE with unusual localizations may cause serious problems of diagnostic confusion. The combination of clinical history, radiological findings, and serological test results (especially the WB) are valuable in diagnosing extrahepatic CE.

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