[An initial imaging study on pulmonary artery hypertension secondary to cancerous invasion of central pulmonary artery in lung cancer].
BACKGROUND
To investigate the incidence of pulmonary artery hypertension secondary to cancerous invasion of central pulmonary artery (CICPA) in lung cancer and the diagnostic value of CT on pulmonary artery hypertension.


METHODS
Twenty cases of lung cancer combined with CICPA underwent pulmonary artery pressure measurement through right heart catheterization and CT scanning. CT findings were blindly assessed and were compared with the results of pulmonary artery pressure measurement.


RESULTS
Three cases (3/20, 15%) showed mild pulmonary artery hypertension in arteries proximal to CICPA segments, in which CT findings were dilation of the main pulmonary artery and increase of the diameter ratio of the main pulmonary artery to the descending aorta at the same level. CT diagnostic accuracy for pulmonary artery hypertension was 90%(18/20).


CONCLUSIONS
Pulmonary artery hypertension occurs with low incidence in lung cancer with CICPA. CT is of great value in diagnosing pulmonary artery hypertension in lung cancer with CICPA.
Department of Radiology, The First University Hospital, West China University of Medical Sciences, Chengdu, Sichuan 610041, P.R.China.
D
D
Guo
W
W
Lu
J
J
Miao
Y
Y
Guan
C
C
Hou
S
S
Hu