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【795】子宫颈上皮内病变.ppt

  • 2026-04-01 00:31:33
【795】子宫颈上皮内病变.ppt

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先看看我写的学习笔记,PPT往下翻。

一、核心定义与发病概况

子宫颈上皮内病变(SIL)是与子宫颈浸润癌密切相关的癌前病变,分为鳞状上皮内病变和腺上皮内病变两类。

  • 发病高峰:30~49 岁,15% 患者<35 岁
  • 临床意义:规范筛查与管理是预防宫颈癌最核心措施

二、病因与危险因素

  1. 核心病因
    高危型 HPV 持续感染是最主要致病因素,近 90% 病变与癌组织可检出高危型 HPV。
  • 主要高危型:16、18、31、33、45、52、58 等
  • 致癌最强:HPV16 型,约 70% 宫颈癌与 16/18 型相关
  • 致癌机制:HPV DNA 整合→E6/E7 癌蛋白表达→抑癌基因失活→上皮异常增生→癌变
  1. 其他危险因素
  • 性行为:多个性伴侣、初次性生活<16 岁
  • 分娩:早年分娩、多产
  • 免疫:免疫低下、长期使用免疫抑制剂
  • 生活方式:吸烟、长期口服避孕药、营养不良

三、HPV 感染流行病学

  • 约 80% 性活跃女性一生中会感染 HPV
  • 我国女性 HPV 感染双峰:17~24 岁、40~44 岁
  • ≥20 岁普通女性感染率约 15%,常见型别为 52、58、16、51
  • 多数感染为一过性,2 年内可清除,仅<5% 持续感染进展为癌前病变 / 癌

四、子宫颈组织学特点

  1. 上皮组成
  • 子宫颈阴道部:复层鳞状上皮(基底层、副基底层、中间层、表层)
  • 子宫颈管:单层柱状上皮,可分泌黏液
  1. 转化区(移行带)
  • 定义:原始鳞‑柱交接部与生理鳞‑柱交接部之间的区域
  • 形成:青春期雌激素作用使柱状上皮外移,再被鳞状上皮替代
  • 关键意义:宫颈癌及癌前病变最好发部位
  • 相关结构:子宫颈腺囊肿(纳博特囊肿)是识别转化区的标志
  1. 上皮替代机制
  • 鳞状上皮化生:储备细胞增殖分化为鳞状上皮
  • 鳞状上皮化:鳞状上皮直接长入替代柱状上皮

五、病理学诊断与分级

  1. 分类体系(二级分类法)
  • 低级别鳞状上皮内病变(LSIL)≈ CIN1
  • 高级别鳞状上皮内病变(HSIL)= CIN2 + CIN3
  1. LSIL 组织学要点
  • 异型细胞局限于上皮下 1/3
  • 核分裂少,上皮上 2/3 成熟
  • 可见挖空细胞,P16 多阴性
  • 多为一过性 HPV 感染,进展风险低
  1. HSIL 组织学要点
  • 异型细胞累及上皮中 2/3 以上(CIN2)或全层(CIN3)
  • 核异型明显,核分裂象多见
  • P16 弥漫强阳性
  • 为鳞癌癌前病变,不治疗可进展为浸润癌
  1. 腺上皮内病变
  • 现名:原位腺癌(AIS),属于高级别病变
  • 是宫颈腺癌的癌前病变
  • 分 HPV 相关型与非 HPV 相关型(胃型 AIS)
  • 多灶性、跳跃性生长,诊断与治疗难度更高

六、临床表现

  • 多数无明显症状
  • 常见表现:阴道分泌物增多、接触性出血(性生活 / 检查后)
  • 妇科检查:宫颈可光滑,或见红斑、白色上皮、糜烂样改变

七、诊断(三阶梯流程)

  1. 第一步:筛查
  • HPV 核酸检测:≥25 岁首选,灵敏度高,可早 3~5 年发现异常
  • 宫颈细胞学(TCT/LCT):特异度高,<25 岁首选
  • 联合筛查:HPV + 细胞学,提高检出率
  • 肉眼筛查:醋酸 / 碘试验,用于资源匮乏地区
  1. 第二步:阴道镜检查
  • 指征:HPV16/18 阳性、细胞学≥LSIL、HPV 阳性伴 ASC‑US
  • 作用:定位病变,指导活检
  1. 第三步:组织病理学(确诊金标准)
  • 宫颈活检:可疑病灶 / 阴道镜异常处取材
  • 宫颈管搔刮(ECC):评估颈管内病变
  • 诊断性锥切术:细胞学高度异常但活检阴性、可疑浸润癌、AIS

八、筛查方案

  • 起始年龄:25 岁开始
  • 25~64 岁(三选一)
    • HPV 单项:每 5 年 1 次
    • HPV + 细胞学联合:每 5 年 1 次
    • 细胞学单项:每 3 年 1 次
  • 终止年龄:65 岁,满足 10 年内连续正常筛查可终止

九、治疗原则

  1. LSIL(CIN1)
  • 原则:观察随访为主,一般不治疗
  • 随访:间隔 1 年复查
  • 治疗指征:持续≥2 年、细胞学提示 HSIL/ASC‑H
  1. HSIL(CIN2/CIN3)
  • 原则:以切除性治疗为主
  • 首选:宫颈锥切术(LEEP/CKC)
  • 消融治疗:仅限 CIN2、阴道镜充分者
  • 保守观察:仅限有生育要求的 CIN2 患者
  • 全子宫切除:锥切确诊、无生育要求、合并其他手术指征
  1. 原位腺癌(AIS)
  • 原则:先锥切排除浸润癌,再根治性治疗
  • 无生育要求:首选全子宫切除术
  • 有生育要求:切缘阴性可严密随访,阳性者再次锥切或切除子宫

十、HPV 疫苗与妊娠合并病变

  1. HPV 疫苗
  • 一级预防手段,安全有效
  • 最佳接种:9~26 岁
  • 接种后仍需常规筛查
  1. 妊娠合并宫颈上皮内病变
  • 特点:雌激素影响易出现细胞学假阳性
  • 处理:妊娠期仅观察,不激进治疗
  • 复查:产后 42 日重新评估

十一、核心要点总结

  1. 高危型 HPV 持续感染是宫颈上皮内病变最主要病因
  2. 转化区是癌前病变与宫颈癌最好发部位
  3. 分为 LSIL(低危)与 HSIL(高危,癌前)两级
  4. 三阶梯诊断:筛查→阴道镜→病理确诊
  5. LSIL 以随访为主,HSIL 以锥切治疗为主
  6. 疫苗 + 筛查是预防宫颈癌最有效组合

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  1. CONNECT:[ UseTime:0.000891s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000788s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001139s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001095s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000650s ]
  6. SELECT * FROM `set` [ RunTime:0.000235s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000662s ]
  8. SELECT * FROM `article` WHERE `id` = 493894 LIMIT 1 [ RunTime:0.006973s ]
  9. UPDATE `article` SET `lasttime` = 1775637076 WHERE `id` = 493894 [ RunTime:0.004884s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000260s ]
  11. SELECT * FROM `article` WHERE `id` < 493894 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000466s ]
  12. SELECT * FROM `article` WHERE `id` > 493894 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000427s ]
  13. SELECT * FROM `article` WHERE `id` < 493894 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002048s ]
  14. SELECT * FROM `article` WHERE `id` < 493894 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002935s ]
  15. SELECT * FROM `article` WHERE `id` < 493894 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002804s ]
0.172314s