Report of Diffusion-Weighted MRI in Two Cases with Different Cerebral Hydatid Disease

Purpose: To present MRI findings in two cases of cerebral hydatid disease with an emphasis on diffusion-weighted imaging (DWI) findings of Echinococcus granulosus (EG) versus Echinococcus alveolaris (EA). Results: EG lesions were isointense with cerebrospinal fluid in all sequences including DWI. On DWI, EA lesions remained hypointense on b=1000 s mm2 diffusion-weighted images. Apparent diffusion coefficient (ADC) values of EG and EA lesions were completely different from each other, 2.88±0.24×10−3 s mm2 and 1.33±0.15×10−3 s mm2, respectively. Conclusion: The ADC values could not be used to discriminate from other differential diagnoses.