Infant who was on arterial-venous ECMO post cardiac arrest and has just been taken off of ECMO and who has palpable masses in the right neck and left chest wall

CT of intramuscular hematoma in patient on extracorporeal membrane oxygenation (ECMO)
Axial CT with contrast of the chest shows hematomas in the right sternocleidomastoid muscle (above) near the ECMO catheter insertion site and left pectoralis major muscle.

The diagnosis was intramuscular hematoma as a complication of ECMO.