PMC2929688_01
The MR images show the characteristic hydatid cyst in the retrovesical space, adherent to the sigmoid colon.
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fig1
In the preoperative planning, we decided to perform a magnetic resonance scan in order to study the relation of the cyst with contiguous organs (Figures 1(a) and 1(b)), and it was found to be posterior to the bladder and strictly adherent to the sigmoid colon.
Surgical specimen.
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fig2
At laparotomy, the cyst was resected out "en bloc" with the sigmoid colon (Figures 2(a), 2(b), and 2(c)).
Microscopy findings.
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fig3
The histological examination confirmed the diagnosis (Figure 3).