Clinical findings. (A) CT scan on the third day of menstruation. There was a nearly round opaque nodule (arrow) in the distal part of the left-superior lobe of the lung. (B) Bronchographic image on the fourth day of menstruation. There was bleeding in the distal bronchus of the superior segment of the left lingular lobe. (C) Exploration of the lingular lobe of the left lung showed the pleural lamina visceralis was hyperemic and phlyctenular (arrow). (D) Making an incision in the left lingular lobe. There was a lesion that constituted the foci of an old hemorrhage (thin arrow) in the pulmonary parenchyma under the pleura. The visceral pleura surrounding the lesion was hyperemic and yellow-staining (thick arrows).