Significant thrombus in saccular aneurysm in a patient with polycythemia: a case report. - Mitsuishi, Atsuyuki; Nakamura, Hiromasa; Miura, Yujiro; Miyata, Tsuyoshi; Orihashi, Kazumasa; Yoshida, Keisuke; Araki, Kouhei (Journal of Cardiothoracic Surgery, 2024)