retroperitoneal

Primary 'retroperitoneal' mucinous cystadenoma is an uncommon tumor found exclusively in women.

A 'retroperitoneal' lesion was dissected that appeared to be an abnormally large tail of the pancreas.

Microscopically, sections from the 'retroperitoneal' masses consisted of spindle cell proliferation involving the lymph node and extending into adjoining soft tissue.

The patient was started on heparin, and a percutaneous, ultrasound-guided needle core biopsy of the 'retroperitoneal' mass was performed.

My pancreas is a 'retroperitoneal' organ that serves two functions.