1、Your company slogan Gastric MALT Lymphoma Self-Introduction 1 MALT Lymphoma Overview 2 Pathology & Diagnosis 3 Treatment 4 Roche MabThera Your company slogan Roche MabThera Gastric MALT Lymphoma Self-Introduction 1 MALT Lymphoma Overview 2 Pathology & Diagnosis 3 Treatment 4 Your company slogan MALT
2、 Lymphoma Overview 起源于黏膜相关淋巴组织的 B细胞淋巴瘤 属非霍奇金淋巴瘤的一种独立类型 总体发展较为缓慢,属于惰性淋巴瘤 长期生存率 80-90% 1983年由 Peter Isaacson提出 MALT (mucosa-associated lymphoid tissue)粘膜相关淋巴组织 Roche MabThera Your company slogan MALT lymphoma Overview 胃 MALT淋巴瘤 diagnosis of gastric lymphoma is difficult at an earlier stage due to its
3、nonspecific symptoms and endoscopic findings 肿瘤发病部位 非胃 MALT淋巴瘤 甲状腺、小肠、唾液腺、眼附属器(结膜、泪腺、眼眶)、呼吸道(肺、咽喉、支气管)、皮肤、乳腺、泌尿生殖道(膀胱、前列腺、输尿管、肾脏),甚至硬脑膜等多个器 *Marginal zone B-cell lymphoma of the mucosa-associated lymphoid tissue (MALT) 50% and diffuse large B-cell lymphoma are the most common histologic types of gas
4、tric lymphoma Roche MabThera Your company slogan Gastric MALT Lymphoma Overview 胃 MALT淋巴瘤约占 50%左右,以成人多见 胃是 MALT淋巴瘤是最常累及的部位 结外淋巴瘤 Extrodonal lymphoma PGL accounts for 30%-40% of all extranodal lymphomas Roche MabThera Your company slogan one of the most common chronic infections more than half of the
5、 worlds population is infected H. pylori infection is the primary pathologic cause of development of low-grade, mucosa-associated lymphoid tissue (MALT) lymphoma of the stomach International guidelines strongly recommend bacterial eradication in all gastric MALT lymphoma patient early stages low-gra
6、de MALT lymphoma can be cured by H. pylori eradication in 60%-80% of cases 胃 MALT淋巴瘤与 HP(Helicobacter pylori 幽门螺杆菌 )感染相关 Roche MabThera Your company slogan 胃 MALT淋巴瘤与 HP感染相关的证据 临床流行病学资料 Wotherspoon等 : 110 例 ( 92% ) Doglioni等 : H.Pylori,胃 MALT淋巴瘤 欧阳钦等 : 78 例( 87.2% ) H.Pylori相关胃炎中发现与淋巴瘤相同序列的单克隆性 B细胞
7、Roche MabThera Your company slogan 胃 MALT淋巴瘤发病的假说 H.Pylori感染 刺激 B细胞 T细胞 3-三体性 异常克隆 低恶性 MALT淋巴瘤 ( H.Pylori依赖型 ) t(11:18) API2-MLT融合 BCL10 核表达 t(1:14) BCL10截断突变 低恶性 MALT淋巴瘤 ( H.Pylori非依赖型 ) P53, DCC, APC 高恶性 MALT淋巴瘤 (现为弥漫性大 B细胞淋巴瘤 ) 直接的抗原刺激 Roche MabThera Your company slogan Gastric MALT Lymphoma Self-Introduction 1 MALT Lymphoma Overview 2 Pathology & Diagnosis 3 Treatment 4 Roche MabThera Your company slogan 诊断 组织病理学诊断是金标准 胃活检诊断困难 容易发生漏取、误取 常规活检组织小、难以观察粘膜全层; 挤压变形的干扰 病变性质:粘膜下层、广泛浸润、多灶性 组织形态上与 HP阳性慢性胃炎重叠 活检诊断率只在 60%-90%之间。 低恶性 MALT淋巴瘤平均活检 3.3次,高恶性 1.4次 Roche MabThera