Fig. 1

a Chest roentgenogram detected the lesions (in red arrows) in the left upper lobe which were initially considered as residual TB lesions. b CT pulmonary angiography showed abnormal communications between the left superior pulmonary vein (in yellow arrow) and left superior pulmonary artery (in red arrow). c, d Surgical specimen (excised left upper lobe) showed the diffusely tortuous vessels all over the lobe and the vascular cavities were extremely dilated (in yellow arrow). TB: tuberculosis; CT: computed tomography