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poststernal
poststernal adj.
Brit. 
/(ˌ)pəʊs(t)ˈstəːnl/
, /(ˌ)pəʊs(t)ˈstəːnl/U.S. /ˌpoʊs(t)ˈstərn(ə)l/
Anatomy and Medicine situated or occurring behind the sternum./ˌpoʊs(t)ˈstərn(ə)l/ΚΠ
1899 T. C. Allbutt et al. Syst. Med. VI. 72 It might be suspected from the intensity and superficialness of post-sternal pain with tenderness.
2002 Ann. Thoracic & Cardiovascular Surg. 8 51/2 Postoperative bleeding through the poststernal drainage tube occurred.
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as lemmas