posteromedial
adjective
pos·tero·me·di·al
| \ ˌpäs-tə-rō-ˈmēd-ē-əl
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Medical Definition of posteromedial
: located on or near the dorsal midline of the body or a body part
Magnetic resonance imaging (MRI) of the abdomen … revealed a thick-walled lesion that was contiguous with the posteromedial wall of the duodenum …— Oliver Freudenreich et al., The New England Journal of Medicine, 16 Feb. 2012