Coexistence of Multiple Pulmonary Sclerosing Pneumocytoma and Scleroderma–Rheumatoid Arthritis Overlap Syndrome: A Case Report

Pulmonary sclerosing pneumocytoma is a rare, low-grade pulmonary tumor observed as unilateral or bilateral multiple nodules at a rate of 4%-5%. Among the autoimmune connective tissue disorders, those most commonly associated with lung malignancies are scleroderma and rheumatoid arthritis. In this study, we report a rare case of a 55-year-old middle-aged Asian woman with slow-growing bilateral multiple pulmonary sclerosing pneumocytoma and scleroderma–rheumatoid arthritis overlap syndrome. The autoimmune disorders and pulmonary fibrosis of this case might have led to the development of PSP.