[Case of intralobar pulmonary sequestration with increased serum sialyl Lewis X-i (SLX)].

A 37-year-old male whose chief complaint was fever and back pain was admitted to our hospital because of a mass shadow in the left lower P3ng field found in X-ray examination. The level of serum SLX on admission increased to 1,338 U/ml. He was diagnosed intralobar pulmonary sequestration by angiography. The left lower lobe was resected 2 months after second admission. His general condition was steady, and he was discharged 18 days after the operation because the level of serum SLX decreased to 49.9 U/ml.