Sacroiliac İnvolvement of Hydatid Cyst

Clinical Images

Contrast-enhanced axial computed tomography (Figure 1A), axial

proton density (Figure 1B), coronal proton density (Figure 1C)

and sagittal proton density (Figure 1D) magnetic resonance (MR)

imaging of a 17-year-old female patient complaining of pain in the

pelvis and left hip are presented. A cystic mass (dashed arrows)

compressing the S1-S2 nerve roots and invading the iliac crest with

a multiloculated septated cystic component (arrows) that extends

into pelvis at the anterior is observed in the left portion of sacrum.

Bone hydatid cyst was suspected and the diagnosis was confirmed

by hydatid cyst serology. Bone hydatid cyst accounts for only 0.5-

2% of all hydatid cysts [1]. Sacral hydatid cyst is rare. Although

its rarity, hydatid cyst should be kept in mind in the differential

diagnosis of cystic masses in the sacrum and iliac bone