Primary non-Hodgkin lymphoma lung: A report of two cases

Lymphomas are a heterogeneous group of malignancies that originate from the neoplastic transformation of lymphocytes. Primary pulmonary non-Hodgkin lymphoma is a rare entity with marginal zone B-cell lymphoma of the mucosa-associated lymphoid tissue (MALT) which is the most common subtype is a low-grade lymphoma accounting for <0.5% of all primary lung neoplasms. The most common presentation is a mass discovered on a chest radiograph in an asymptomatic patient, with symptomatic patients presenting with cough, dyspnea, chest pain, and hemoptysis. On computerized tomography, multiple bilateral lesions are commonly seen in pulmonary MALT lymphoma with consolidation, nodule, and mass being the main morphological patterns. We present two cases diagnosed with marginal zone lymphoma of the lung which is an indolent lymphoma and the most common subtype in the lung.