Medial triangular space

Radiopaedia • CC-by-nc-sa 3.0 • de

The medial (or upper) triangular space is a communication between the axilla and the posterior scapula region. It should not be confused with the similarly named lateral (lower) triangular space.

Gross anatomy

It is a medially pointing triangle with a base laterally and apex inferomedially.

Boundaries
  • laterally: medial border of the long head of triceps brachii muscle
  • inferiorly: superior border of the  teres major muscle
  • superiorly: inferior border of the subscapularis muscle (some references list teres minor muscle)
Contents