Unusual Myocardial (Myostromal) “Repair” in Cardiac Transplant Patient

A 57-year-old man received a cardiac allograft for severe ischemic heart disease. His endomyocardial biopsy at eight weeks postoperatively showed a focus of unusual myocardial morphology characterized by small diameter myocytes associated with loose, myxoid appearing stroma and a myocytic mitotic figure. We feel this may represent a unique type of myocardial repair.