Abstract

背景与目的胸腺瘤常伴发重症肌无力(myasthenia gravis, MG),但是这些患者行胸腺切除的预后与MG的关系尚不明确。本研究旨在探讨影响胸腺瘤合并MG患者预后的因素。方法回顾性分析中国胸腺瘤协作组(Chinese Alliance for Research of Thymoma, ChART)数据库1992年-2012年875例随访20年资料完整的胸腺瘤病例,分析世界卫生组织(World Health Organization, WHO)组织学分型、Masaoka分期、术后辅助治疗与MG及预后的关系。结果胸腺瘤WHO组织学分型与MG有相关性,差异有统计学意义(χ2=24.908, P < 0.001)。MG发生率为22.7%,其中B2型(58/178, 32.58%) > B3型(65/239, 27.20%) > B1型(27/132, 20.45%) > AB型(43/267, 16.10%) > A型(6/59, 10.17%),Masaoka分期与MG无相关性(χ2=1.365, P=0.714)。生存分析表明WHO分型、Masaoka分期与预后有关(P < 0.05),而是否合并MG(χ2=0.113, P=0.736)、是否行胸腺扩大切除(χ2=1.548, P=0.213)、术后辅助放疗(χ2=0.380, P=0.538)与预后无相关,术后辅助化疗与差的预后相关(χ2=14.417, P < 0.001)。是否行胸腺扩大切除与MG的疗效有相关性(χ2=24.695, P < 0.001)。结论胸腺瘤患者是否合并MG和是否行胸腺扩大切除与预后无相关性,胸腺扩大切除可改善MG患者的疗效。

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