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Research Article Open access CC BY 4.0

Primary Pulmonary MALT Lymphoma: An Unusual Cause of Non-resolving Pneumonia

Shan Kai Ing, Yih Hoong Lee, Khai Fatt CHAO, Nga Hung NGU, Xin Yee TAN, Antony K., Teresa Fuh Guang CHUA, Sze Shyang KHO, Siew Teck TIE, Tze Shin LEONG, Lee Ping CHEW

Asian Hematology Research Journal · pp. 35–41 · Published 8 Mar 2025

10.9734/ahrj/2025/v8i1192

Abstract

Mucosa-associated lymphoid tissue (MALT) lymphoma is a rare type of extranodal, low-grade B-cell lymphoma. Pulmonary MALT lymphoma is particularly uncommon and typically progresses slowly. Patients often present with asymptomatic, chronic alveolar opacities detected on chest radiographs or exhibit non-specific respiratory symptoms. In this report, we discuss the case of a male patient in his late 60s who experienced persistent cough for one year following a diagnosed episode of pneumonia. Chest radiography revealed large area of consolidation in the right lung, which was further confirmed by computed tomography (CT) showing extensive consolidation involving right upper, middle and lower lobes. Histopathological analysis of a transbronchial lung biopsy confirmed the diagnosis of MALT lymphoma. However, the patient was not keen on chemotherapy and therefore only received corticosteroid therapy. This case underscores the importance of considering MALT lymphoma as a potential diagnosis in patients with non-resolving lung consolidation.

Mucosa-associated lymphoid tissue pneumonia MALT lymphoma diagnosis

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