title: Primary pulmonary artery sarcoma differentiated from pulmonary thromboembolism by ventilation-perfusion scan. Long survival of the patient.
abstract: Primary pulmonary artery sarcoma (PAS) is a rare and highly lethal tumor. Here, we report a case of a 53-year-old female with PAS who was initially diagnosed with chronic pulmonary thromboembolism (PTE) based on the results of a transthoracic Doppler echocardiogram, a contrast-enhanced computed tomography angiography, and a ventilation/perfusion lung scan.
  
  
  CONCLUSIONS
  We emphasize the difficulties in diagnosing PAS, the need to investigate this neoplasm in the differential diagnosis of PTE, the diagnostic value of different imaging techniques in the identification of the the tumor, and the efficacy of adjuvant chemotherapy in prolonging survival.
authors.affiliation: Department of Nuclear Medicine, Zhongshan Hospital, Fudan University, Nuclear Medicine Institute of Fudan University, Shanghai Institute of Medical Imaging, Shanghai, 200032, China. shi.hongcheng@zs-hospital.sh.cn.
authors.forename: Beilei
authors.initials: B
authors.lastname: Li
authors.forename: Yiqiu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Liang
authors.initials: L
authors.lastname: Cai
authors.forename: Jun
authors.initials: J
authors.lastname: Hou
authors.forename: Hongcheng
authors.initials: H
authors.lastname: Shi
mesh_terms: D003937:Diagnosis, Differential; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging*; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D012509:Sarcoma / Q000000981:diagnostic imaging*; D019043:Vascular Neoplasms / Q000000981:diagnostic imaging*; D014692:Ventilation-Perfusion Ratio