Figure 1
Sagittal (A) and paracoronal reformatted (B) T2-weighted images show a large thick-walled presacral cystic mass (arrowheads) with a thin anteroinferior neck (arrows) connecting to the prostatic urethra at the level of the verumontanum. The cystic component has a homogeneous high T2 signal intensity, with a low T2 signal intensity cyst wall. Axial T1-weighted image (C) shows low signal intensity of the cyst (white asterisk), similar to the bladder content, excluding hemorrhagic/proteinaceous components. Axial fat saturated T1-weighted vibe image after intravenous contrast administration (D) shows only contrast enhancement of the cyst walls (black arrowheads). There is a right-sided displacement of the prostate secondary to surgical pull-through intervention as treatment for the anal atresia. Also note the congenital sacral deformity (black asterisk on A).