Figure 1From: A rare case of rapidly enlarging tracheal lobular capillary hemangioma presenting as difficult to ventilate acute asthma during pregnancy Bronchoscopic view at the edge of endotracheal tube. A highly vascular polypoidal lesion is seen, which causes a ball-valve phenomenon during respiration to generate severe compromise of expiratory airflow (Additional file 1: Video 1).Back to article page