Pulmonary sequestration associated with a synchronous elevation of carbohydrate antigen 50 and 19-9: a case report

This report describes a 37-year-old woman who experienced elevated serum carbohydrate antigen 19-9 (CA19-9) and carbohydrate antigen 50 (CA50). Intralobar pulmonary sequestration was confirmed via enhanced chest computed tomography (CT) scanning and positron emission tomography/computed tomography (PET/CT), which indicated two abnormal vessels arising from the descending thoracic aorta. Lobectomy of the left inferior lobe was performed as the optimal surgical approach and the pathological analysis met the diagnosis of intralobar pulmonary sequestration. Review of the patient’s serum levels of CA50 and CA19-9 showed that these two tumor markers significantly decreased after surgery and finally went down to normal values. Therefore, the synchronically significant elevation of serum CA50 and CA19-9 was due to intralobar pulmonary sequestration.