Simultaneous pulmonary thromboembolism and superior mesenteric venous thrombosis associated with hyperhomocysteinemia secondary to pernicious anemia-induced vitamin B12 deficiency

恶性贫血引起的维生素B12缺乏导致高同型半胱氨酸血症，并伴有肺血栓栓塞和肠系膜上静脉血栓形成。