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Vol.48 No.1 contents | Japanese/English |
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- Case Report -
A Case of Pulmonary Mucosa-associated Lymphoid Tissue Type Lymphoma with Low-grade Accumulation of 18-fluorodeoxyglucose on Positron Emission Tomography
Yasuki Hachisuka1, Masashi Uomoto11Department of Thoracic Surgery, Matsuyama Shimin Hospital, Japan
Background. Pulmonary mucosa-associated lymphoid tissue (MALT) type lymphoma is a relatively rare entity. Only a limited numbers of articles have been published on FDG-PET results of pulmonary MALT type lymphoma. Case. A 60-year-old woman with cough and malaise had a 1.5-cm pulmonary nodule in the right lower lobe which was detected on a chest CT examination. The nodule showed low-grade FDG accumulation on PET. Then inflammatory lesion or lung cancer was suspected. Core needle biopsy by video-assisted thoracoscopic surgery was performed and plasmacytoma or lymphoma was suspected. Then wedge resection of the right lower lobe was performed. The histopathological diagnosis was pulmonary marginal zone B-cell lymphoma of the MALT type, exhibiting marked plasma cell differentiation. Conclusion. To the best of our knowledge, only 10 cases of pulmonary MALT type lymphomas with FDG-PET results, including our case have been reported. Eight cases showed FDG-PET positive uptake but 2 cases were negative. Pulmonary MALT type lymphoma should be considered in the differential diagnosis of pulmonary lesions with positive FDG-PET uptake. We report a case of pulmonary MALT type lymphoma with low-grade FDG accumulation on PET.
key words: Pulmonary mucosa-associated lymphoid tissue (MALT) type lymphoma, Positron emission tomography with 18-fluorodeoxyglucose (FDG-PET), Lung cancer
Received: September 19, 2007
Accepted: December 3, 2007
JJLC 48 (1): 56-61, 2008
