Three synchronous bilateral lung tumors: a case report.

Two synchronous primary lung carcinomas presenting bilaterally are rare. Their presentation, predisposing factors, and treatment are similar to those of single lung carcinomas. The authors present the first reported case known to them of three synchronous primary lung carcinomas involving both lungs. These tumors fulfill accepted criteria for synchronous tumors--each is malignant, each is anatomically separate and distinct from the other, and each is histologically different and is not a manifestation of metastatic disease.