A 51-year-old woman with a history of right coronary artery to coronary sinus fistula, associated with coronary sinus aneurysm, underwent surgical repair of such. A coronary sinus "thrombus" was removed during surgery and submitted for surgical pathology review. Grossly, the lesion consisted of tan-brown fibromembranous tissue measuring 3.6 cm in greatest dimension. Representative microscopic images (including relevant immunohistochemistry) are shown.
|Melanie Bois, M.D.
Fellow, Division of Cytopathology
|Joseph Maleszewski, M.D.
Consultant, Division of Anatomic Pathology