Retroperitoneal Cystic Review

Retroperitoneal cystic lymphangioma Cystic teratoma Pseudomyxoma retroperitonei  Epidermoid cyst Mullerian cyst Retroperitoneal mucinous cystadenoma

Retroperitoneal cystic lymphangioma in a 37-year-old man.

Contrast material-enhanced CT scan shows a low-attenuation mass in the right anterior pararenal space (arrow).

Cystic teratoma in a 3-year-old girl.

Contrast-enhanced CT scan shows a well-defined hypoattenuating mass with internal septa and calcifications in the right anterior pararenal space (arrow).

Pseudomyxoma retroperitonei resulting from rupture of a mucinous cystadenocarcinoma of the appendix in a 64-year-old man. Contrast-enhanced CT scans show lobulated hypoattenuating masses in the right lower quadrant (arrows in a, thick arrows in b), mass effect on the right psoas muscle and right ureter, and a tiny wall calcification (thin arrow in b).

Epidermoid cyst in a 30-year-old woman

Contrast-enhanced CT scan shows a well-defined hypoattenuating mass in the pelvic retroperitoneum (thick arrow). The rectum is anteriorly displaced (thin arrow).

Müllerian cyst in a 57-year-old woman.

Contrast-enhanced CT scan shows a well-defined cystic mass in the left retroperitoneal space (arrow).

Retroperitoneal mucinous cystadenoma in a 41-year-old woman.

Contrast-enhanced CT scan shows a homogeneously hypoattenuating mass in the right anterior pararenal space (arrow).

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