Elevated Squamous Cell Carcinoma Associated Antigen and Pulmonary Nodule Caused by Airway Foreign Bodies Mimic Lung Cancer.

Background: Airway foreign bodies can occur at any age and often expose the patients to the risk of pulmonary infections, pulmonary atelectasis, and even asphyxia. It is more commonly observed in children and less likely in adults. We report a case of an elderly man with elevated squamous cell carcinoma-associated antigen combined with multiple nodules in both lungs, initially diagnosed as lung cancer and eventually diagnosed as multiple foreign bodies in both lungs by bronchoscopy.

A Rare Case of Benign Hamartoma and Malignant Primary Pulmonary Lymphoma Coexisting in a Patient Mimicking Invasive Pulmonary Mycosis: a Case Report and Literature Review.

Background: Pulmonary hamartomas are the most common benign tumors of the lungs and can occur anywhere in the lungs, normal hyperplasia, congenital malformation, inflammatory changes, and tumorigenesis are hypothesized to underlie the pathogeny, but the definite etiology remains to be elucidated. Primary pulmonary lymphoma (PPL) refers to clonal lymphoid hyperplasia of one or both lungs in patients who have no detectable extrapulmonary lymphoma or bone marrow involvement at the time of diagnosis and during the subsequent 3 months. It is rare for both diseases to occur in the lungs of the same patient.