肺黏膜相关淋巴组织型边缘区B细胞淋巴瘤一例

肺黏膜相关淋巴组织型边缘区B细胞淋巴瘤(marginal zone B-cell lymphoma of the mucosa-associated lymphoid tissue type,MALT-MZL)是一种较为罕见的肺部原发性恶性肿瘤.本例患者采用纤维支气管镜检查,经组织病理和免疫组化确诊,具有完整的病例资料,并结合国内相关资料进行文献分析,以探讨其临床、病理特点及诊断、治疗方法.患者主要表现为周期性发热、咳嗽、胸痛,用正规的抗生素治疗无效.胸部CT显示右肺中叶和左肺下叶实变,伴有支气管充气征和CT血管造影征,肺实变内可见扩张的支气管.左侧少量胸腔积液,是单核细胞为主的渗出液.血清蛋白电泳发现M蛋白.支气管镜下可见左肺下叶、右肺中叶支气管狭窄,用支气管镜进行透壁肺活检,病理为小淋巴细胞弥漫浸润,可见淋巴上皮病变;免疫组化CD20阳性,CD3,CD5,CD10,CD21,CD23,Bcl2和Bcl6阴性.肺MALT-MZL是肺原发性淋巴瘤中最常见的一种类型,大多数临床表现不典型,易误诊,及时行有创检查取得病理标本有助于早期诊断.某些临床表现(如周期性发热,肺实变及其内扩张的支气管, 血浆或支气管肺泡灌洗液中出现M蛋白等)具有一定的特征性.治疗方法主要为手术、放疗和化疗.肺MALT-MZL属于惰性淋巴瘤,预后相对良好.

A case of marginal zone B-cell lymphoma of the pulmonary mucosa-associated lymphoid tissue type

SUMMARY Marginal zone B-cell lymphoma of the pulmonary mucosa-associated lymphoid tissue type (pulmonary MALT-MZL), a common kind of primary pulmonary lymphoma, is rare in pulmonary malignant tumors. One patient in our hospital was diagnosed by bronchoscope and the literatures on the subject were reviewed. The patient presented with periodical fever, cough and chest pain, and antibiotic therapy had no use. Chest CT scan showed the consolidation of right middle lobe and left lower lobe with CT angiogram signs, air bronchograms and distended bronchi. Pleural effusion in the left thorax mainly consisted of monocytes. Monoclonal protein was found in the electrophoresis of serum protein. Bronchial stenosis and swollen mucosa were seen with bronchoscope. The tissue section of transbronchial lung biopsy (TBLB) specimens showed diffusedly infiltrated small lymphocytes and a lymphoepithelial lesion. CD20 was positive and CD3, CD5, CD10, CD21, CD23, bcl2, bcl6 were negative in immunohistochemical stain. The clinical manifestations of pulmonary MALT-MZL are nonspecific and misdiagnosis is common, Appropriate invasive biopsy procedures are necessary for early diagnosis. Presentations such as periodical fever, distended bronchi in pulmonary consolidation, monoclonal protein might indicate diagnosis. Treatment includes surgical resection, radiotherapy and chemotherapy. Pulmonary MALT-MZL belongs to inert lymphoma and prognosis is relatively good.