E-ISSN: 1305-3612
The role of diffusion-weighted MRI in the classification of liver hydatid cysts and differentiation of simple cysts and abscesses from hydatid cysts
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Abdominal Imaging - Original Article
VOLUME: 16 ISSUE: 4
P: 279-287
December 2010

The role of diffusion-weighted MRI in the classification of liver hydatid cysts and differentiation of simple cysts and abscesses from hydatid cysts

Diagn Interv Radiol 2010;16(4):279-287
DOI: 10.4261/1305-3825.DIR.2807-09.2
Esra Oruç 1
Nalan Yıldırım 1
Naile Bolca Topal 1
Sadık Kılıçturgay 2
Semra Akgöz 3
Gürsel Savcı 4
1. Departments of Radiology, Uludağ University School of Medicine, Bursa, Turkey
2. Departments of General Surgery, Uludağ University School of Medicine, Bursa, Turkey
3. Department of Biostatistics, Çanakkale Onsekiz Mart University School of Medicine, Çanakkale, Turkey
4. Uludağ Üniversitesi Tıp Fakültesi, Radyoloji Anabilim Dalı, Görükle, Bursa
No information available.
No information available
Received Date: 06.08.2009
Accepted Date: 24.09.2009
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ABSTRACT

PURPOSE

The purpose of this study is to identify the role of diffusionweighted magnetic resonance imaging (DW-MRI) in the classification of liver hydatid cysts (HCs) and their differentiation from simple cysts and liver abscesses.

MATERIALS AND METHODS

Twenty-two patients that were sent to our department with preliminary diagnoses of HCs or abscess were included in the study. Thirty lesions were evaluated. MRI included T1-weighted fast gradient echo, T2-weighted half-Fourier acquisition single-shot turbo spin echo, and DW single-shot echo planar pulse sequencing (b, 0, 50, and 1000 s/mm2). The apparent diffusion coefficient (ADC) values (mm2/s) of the HCs, abscesses, and simple cysts were calculated.

RESULTS

No statistically significant difference was found between the ADC values of type 1 and 3 (P > 0.05) HCs and of simple cysts and type 1 HCs (P > 0.05). The ADC values of abscesses were significantly lower than those of type 1 and type 3 HCs, and simple cysts. No statistically significant difference was found between the ADC values of abscesses and type 4 HCs (P > 0.05). Type 4 lesions exhibited significantly lower ADC values in comparison to type 1 and 3 HCs.

CONCLUSION

DW-MRI helps differentiate type 4 lesions from other cysts and can distinguish abscesses from hydatid cysts other than type 4 as well as from simple cysts. Type 1 HCs cannot be differentiated from simple cysts using ADC values alone, and type 4 lesions are indistinguishable from abscesses.