Pulmonary lymphoma of the mucosa-associated lymphoid tissue type: Report of a case with cytological, histological, immunophenotypical correlation, and review of the literature.

A 59-year-old woman presented to The University of South Alabama, Mobile, Ala, with the complaint of shortness of breath. A chest radiograph showed bilateral nodules and interstitial infiltrates. The diagnosis of lymphoma was suggested on bronchial brush smears. Biopsy revealed a multifocal centrocyte-like lymphoid infiltrate involving the bronchial walls with lymphoepithelial lesions. The lymphocytes were positive for CD19, CD20, and CD22. A diagnosis of pulmonary lymphoma of the mucosa-associated lymphoid tissue type was established and the patient responded to chemotherapy treatment. Over the following 5 years, she suffered at least 2 recurrences involving the lung and breast for which she received additional treatment.