Marginal zone XXXX of the pulmonary mucosa-associated lymphoid tissue: A case report.

@entity1 @entity3329 @entity7571 @entity10911 @entity706 @entity5 @entity75 @entity1074 @entity2686 @entity1050 @entity5893 @entity4910 @entity1892 @entity358 @entity7527 @entity850 @entity221
UNASSIGNED: Marginal zone @entity1892 of the pulmonary mucosa-associated lymphoid tissue ( @entity358 ) is a common type of primary @entity706 , but is rare as a pulmonary @entity5 . In the present study, a 49-year-old male @entity1 was admitted to The First Affiliated Hospital of Xi'an JiaTong University (Xi'an, China) with a @entity358 in the right upper lung. The @entity1 was diagnosed with @entity358 subsequent to undergoing chest computed tomography (CT), a routine blood test, pathological and histological examinations, a transbronchial lung biopsy and bronchoscopy. A chest CT scan revealed right middle lobe consolidation and inflammatory signs, accompanied by @entity3329 in the anterior basal segment of the upper lobe and CT angiogram signs. @entity850 and swollen mucosa were observed by bronchoscopy. The tissue section of the transbronchial lung biopsy specimens revealed diffusely infiltrated monocytoid B-cell lymphocytes and a @entity75 . The tissue was found to be positive for @entity2686 ( @entity1050 )20, @entity1892 2 and @entity7571 expression, but negative for CD3, @entity5893 , @entity4910 and k-light chain expression. @entity10911 and @entity7527 , located in the residual follicular dendritic cells, were detected by immunohistochemical staining. The clinical manifestations of @entity358 are non-specific and misdiagnosis frequently occurs in clinical practice. Therefore, an appropriate invasive biopsy procedure is necessary for early and accurate diagnosis of @entity358 . Clinical presentation that includes periodic @entity221 and distended bronchi in @entity358 may indicate a diagnosis of @entity1074 . Pulmonary @entity1074 belongs to the category of @entity706 and accurate clinical diagnosis is challenging. The results in the present study may provide additional evidence for the accurate diagnosis of this rare entity.
