Chest CT scan of a patient with LAM (A) showing a large lymphangioleiomyoma (L, outlined area) involving the pre-tracheal and left lung hilar area, and an abdominal CT scan (B) of a patient with LAM showing a very large lymphangioleiomyoma (L, outlined area) located in the retroperitoneal area surrounding the aorta and inferior vena cava. SVC, superior vena cava; IVC, inferior vena cava; A, aorta.