Definition of retroperitoneal in English:
 retroperitoneal
adjective ˌrɛtrəʊˌpɛrɪtəˈnɪəlˌretrōˌperətnˈēəl
Anatomy Medicine Situated or occurring behind the peritoneum.
 Example sentencesExamples
-  Primary retroperitoneal mucinous cystadenoma is an uncommon tumor found exclusively in women.
 -  My pancreas is a retroperitoneal organ that serves two functions.
 -  The patient was started on heparin, and a percutaneous, ultrasound-guided needle core biopsy of the retroperitoneal mass was performed.
 -  Microscopically, sections from the retroperitoneal masses consisted of spindle cell proliferation involving the lymph node and extending into adjoining soft tissue.
 -  A retroperitoneal lesion was dissected that appeared to be an abnormally large tail of the pancreas.
 
  Definition of retroperitoneal in US English:
 retroperitoneal
adjectiveˌretrōˌperətnˈēəl
Anatomy Medicine Situated or occurring behind the peritoneum.
 Example sentencesExamples
-  The patient was started on heparin, and a percutaneous, ultrasound-guided needle core biopsy of the retroperitoneal mass was performed.
 -  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.
 -  My pancreas is a retroperitoneal organ that serves two functions.
 -  Microscopically, sections from the retroperitoneal masses consisted of spindle cell proliferation involving the lymph node and extending into adjoining soft tissue.