Thymus and lung mucosa-associated lymphoid tissue lymphoma with adenocarcinoma of the lung: a case report and literature review

• Published in: World journal of surgical oncology 2023-01, Vol.21 (1), p.20-20, Article 20
• Main Authors: Pang, Yu, Li, Daosheng, Chen, Yiqian, Liu, Qinqin, Wu, Yuheng, Teng, Qingliang, Liu, Yuyu
• Format: Article
• Language: English
• Subjects: Adenocarcinoma; Adenocarcinoma - complications; Adult; Analysis; B-cell lymphoma; Biomarkers; Cancer; Care and treatment; Case Report; Case reports; Chromosomes; Collision tumor; Complications and side effects; Computed tomography; Cysts; Cytogenetics; Diagnosis; Female; Genes; Histopathology; Humans; Immunosuppressive agents; Immunotherapy; Literature reviews; Lung - pathology; Lung adenocarcinoma; Lung cancer; Lung Neoplasms - pathology; Lymphocytes; Lymphocytes B; Lymphoma; Lymphoma, B-Cell, Marginal Zone - complications; Lymphoma, B-Cell, Marginal Zone - diagnosis; Lymphoma, B-Cell, Marginal Zone - pathology; MALT lymphoma; Molecular modelling; Mucosa; Mucosal-associated lymphoid tissue; Mutation; Non-Hodgkin's lymphomas; Opacity; Patient outcomes; Plasma; Risk factors; Sjogren's syndrome; Sjogren's Syndrome - complications; Sjogren's Syndrome - diagnosis; Sjögren’s syndrome; Thymus; Thymus gland; Tissues; Tomography; Tumors
• ISSN: 1477-7819; 1477-7819
• DOI: 10.1186/s12957-023-02904-2

Mucosa-associated lymphoid tissue (MALT) lymphoma is a common, low-grade, malignant B-cell lymphoma. However, simultaneous MALT lymphoma in the thymus and lung is extremely rare, and concomitant adenocarcinoma of the lung is even rarer. Herein, we report a rare case of a collision tumor in which MALT lymphoma was found in both the thymus and lung with Sjögren's syndrome (SS) and adenocarcinoma in the lung. A physical examination of a 32-year-old woman revealed an anterior superior mediastinal space-occupying lesion, and chest computed tomography (CT) indicated a nodular ground-glass opacity and irregular mixed-density focus in the right lung. All lung cancer-related tumor biomarkers were within normal ranges. The thymus and part of the lung tissue were surgically resected. The histopathology and molecular examinations confirmed MALT lymphoma of the thymus and lung with lung adenocarcinoma. SS was also diagnosed. No special postoperative treatment was performed for the MALT lymphoma, and the patient underwent immunosuppressive therapy for SS after 4 months of follow-up observation. MALT lymphoma of the thymus and lung tissues has no specific presentation on imaging and is difficult to differentiate from common malignant tumors, and the definite diagnoses of these tumors are highly dependent on histopathological examination in combination with molecular testing and cytogenetics. SS may be an important potential condition for the occurrence of MALT lymphoma in the thymus and lung. Additional similar cases are needed to clarify the biological pathways and potential molecular mechanisms of rare lymphomas and collision tumors.