Cystic retroperitoneal lesions
Cystic retroperitoneal lesions can carry a relatively broad differential, which includes:
- retroperitoneal lymphatic malformation
- retroperitoneal mucinous cystadenoma
- retroperitoneal cystic teratoma
- retroperitoenal cystic mesothelioma
- pseudomyxoma retroperitonei with cystic change
- perianal mucinous carcinoma with cystic change
- pseudocysts
- pancreatic pseudocyst
- non-pancreatic pseudocyst
- retroperitoneal lymphocele
- urinoma
- tailgut cyst
- retroperitoneal hematoma with liquefaction
- retroperitoneal hydatid cyst
- retroperitoneal bronchogenic cyst 1
- cisterna chyli: if in expected location right of the aorta, posterior to the right crus usually L1, L2 level 4
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