Lung Mucosa-Associated Lymphoid Tissue Lymphoma

**Semantic type:** Neoplastic Process

**Definition:** An extranodal marginal zone lymphoma that arises from the lung. It is characterized by the neoplastic proliferation of small B-lymphocytes, monocytoid cells and cells with plasma cell differentiation in the marginal zones of reactive lymphoid follicles. The neoplastic cells infiltrate the interfollicular areas and the bronchial epithelium forming lymphoepithelial lesions. The neoplasm is usually discovered as a mass in a chest x-ray in asymptomatic patients. When symptoms occur, they include cough, dyspnea, hemoptysis, and chest pain. If the lung lesions are resectable, surgery can result in prolonged remission.

**Synonyms:** - BALT Lymphoma - BALT lymphoma - BALToma - Bronchial MALT Lymphoma - Bronchial Mucosa-Associated Lymphoid Tissue Lymphoma - Bronchial-associated lymphoid tissue lymphoma - Bronchus-Associated Lymphoid Tissue Lymphoma - Lung Extranodal Marginal Zone Lymphoma of Mucosa-Associated Lymphoid Tissue - Lung MALT Lymphoma - Pulmonary Extranodal Marginal Zone Lymphoma of Mucosa-Associated Lymphoid Tissue - Pulmonary MALT Lymphoma - Pulmonary Mucosa-Associated Lymphoid Tissue Lymphoma