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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2018; 28(03): 342-349
DOI: 10.4103/ijri.IJRI_121_18
Thoracic Imaging

Magnetic resonance imaging as an adjunct to computed tomography in the diagnosis of pulmonary Hydatid cysts

Roopa Tandur
Department of Radiodiagnosis, Christian Medical College, Vellore, Tamil Nadu, India
,
Aparna Irodi
Department of Radiodiagnosis, Christian Medical College, Vellore, Tamil Nadu, India
,
Binita Riya Chacko
Department of Radiodiagnosis, Christian Medical College, Vellore, Tamil Nadu, India
,
Leena Robinson Vimala
Department of Radiodiagnosis, Christian Medical College, Vellore, Tamil Nadu, India
,
Devasahayam Jesudas Christopher
Department of Pulmonary Medicine, Christian Medical College, Vellore, Tamil Nadu, India
,
Birla Roy Gnanamuthu
Department of Cardiothoracic Surgery, Christian Medical College, Vellore, Tamil Nadu, India
› Author Affiliations Financial support and sponsorship Nil.
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Abstract

Introduction: Although pulmonary hydatid cysts can be diagnosed on computed tomography (CT), sometimes findings can be atypical. Other hypodense infective or neoplastic lesions may mimic hydatid cysts. We proposed that magnetic resonance imaging (MRI) may act as a problem-solving tool, aiding the definite diagnosis of hydatid cysts and differentiating it from its mimics. The aim of this study is to assess the findings of pulmonary hydatid cysts on CT and MRI and the additional contribution of MRI in doubtful cases. Materials and Methods: This is a retrospective study of 90 patients with suspected hydatid cysts. CT and MRI findings were noted and role of MRI in diagnosing hydatid cysts and its mimics was studied. Descriptive statistics for CT findings and sensitivity and specificity of MRI were calculated using surgery or histopathology as gold standard. Results: Of the 90 patients with suspected pulmonary hydatid cysts, there were 52 true-positive and 7 false-positive cases on CT. Commonest CT finding was unilocular thick-walled cyst. In the 26 patients who had additional MRI, based on T2-weighted hypointense rim or folded membranes, accurate preoperative differentiation of 14 patients with hydatid cysts from 10 patients with alternate diagnosis was possible. There was one false-positive and one false-negative case on MRI. Conclusion: Although hydatid cyst can be diagnosed on CT on most occasions, sometimes there are challenges with certain mimics and atypical appearances. T2-weighted MRI can act as a problem solving tool to conclusively diagnose hydatid cyst or suggest an alternate diagnosis.

Keywords

Computed tomography - hydatid - magnetic resonance imaging - pulmonary


Publication History

Article published online:
26 July 2021

© 2018. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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