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Sonographic findings of active Clonorchis sinensis infection
Author(s) -
Choi Dongil,
Hong SungTae,
Lim Jae Hoon,
Cho SeungYull,
Rim HanJong,
Ji Zhuo,
Yuan Ren,
Wang Shuyu
Publication year - 2004
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.10216
Subject(s) - clonorchiasis , clonorchis sinensis , medicine , echogenicity , gallbladder , gastroenterology , opisthorchiasis , population , pathology , ultrasonography , radiology , immunology , helminths , environmental health
Purpose The aim of this study was to document the characteristic sonographic findings of clonorchiasis for the diagnosis of active infection in an endemic area. Methods In a village in northeastern China, residents underwent fecal examinations for detection of Clonorchis sinensis eggs. Shortly thereafter, residents were examined with abdominal sonography. An experienced radiologist performed the sonographic examinations and analyzed the findings. Subjects whose fecal examinations were positive for eggs were considered to have active clonorchiasis; those whose examinations were negative for eggs were used as control subjects. The distinguishing sonographic features of active clonorchiasis were identified by stepwise logistic regression analysis. Results The study population comprised 457 subjects; fecal examinations revealed C. sinensis eggs in 316 and no eggs in 141. Four sonographic findings distinguished subjects with active clonorchiasis from control subjects: increased periductal echogenicity ( p < 0.001; R = 0.11; sensitivity, 35%; specificity, 91%), floating echogenic foci in the gallbladder ( p < 0.001; R = 0.09; sensitivity, 28%; specificity, 94%), diffuse dilatation of the intrahepatic bile ducts ( p < 0.01; R = 0.03; sensitivity, 67%; specificity, 48%), and gallbladder distention ( p < 0.05; R = 0.02; sensitivity, 3%; specificity, 100%), in decreasing order of significance. Among these 4 sonographic findings, increased periductal echogenicity and floating echogenic foci in the gallbladder were more significantly associated with active infection than were the other 2. Conclusions Increased periductal echogenicity and floating echogenic foci in the gallbladder were identified as the 2 most significant findings for the sonographic diagnosis of active C. sinensis infection. © 2003 Wiley Periodicals, Inc. J Clin Ultrasound 32:17–23, 2004