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学习笔记:微乳头型尿路上皮癌病理诊断+副高考点复习

  • 2026-04-24 07:29:35
学习笔记:微乳头型尿路上皮癌病理诊断+副高考点复习

      复习浸润性尿路上皮癌时,看到一个核心知识点:浸润性尿路上皮癌并非只有经典形态,存在大量特殊亚型,包括巢状、微囊型、微乳头型、淋巴上皮瘤样型、浆细胞样/印戒细胞样、肉瘤样、巨细胞型、富脂性、透明细胞型等十余种亚型,既是我们日常病理诊断的难点,也是病理副高考试的高频考点。今天重新学习一下临床遇到的一例疑难膀胱病例,复盘诊断思路,同时梳理必考鉴别要点,供需要的朋友参考学习。

本次分享一例疑难膀胱占位病变。初看镜下满视野肿瘤细胞,和我们日常接触的常规尿路上皮癌形态截然不同。

      这是发生于膀胱的恶性病变,第一诊断思路优先考虑浸润性尿路上皮癌。但形态特殊,很容易产生疑问:是否为其他部位肿瘤膀胱转移?结合患者病史排查:患者无任何其他系统恶性肿瘤病史。再细致观察组织学结构,可发现肿瘤细胞与尿道被覆上皮延续,存在明确移行关系,可见肿瘤突破基底膜,向间质浸润性生长。免疫组化:GATA3阳、CK20阳、P504S阳。综合病史、形态、免疫组化,最终确诊为膀胱原发性肿瘤,排除转移性癌。

镜下细胞学特征典型:肿瘤细胞异型性显著,细胞核体积增大、深染、形态多样,具备明确恶性细胞学特征,如下图:

肿瘤细胞成团密集排列,形态是否符合神经内分泌肿瘤?免疫组化标记:Syn、CGA、CD56阴性,排除神经内分泌肿瘤。

      进一步细致辨析组织结构:该病例肿瘤细胞无纤维血管轴心,形成大量微乳头、细小细胞簇及小巢状结构,漂浮在肿瘤性腔隙内。好像血管内癌栓,但细胞巢无内皮细胞覆盖。且病灶内微乳头、细胞小巢直径普遍<0.1mm,排列致密。结合全部形态学特征,本病例最终诊断:微乳头型浸润性尿路上皮癌。

副高考点:尿路上皮癌特殊亚型,参考病理副高习题集经典考题,如下图:

该题型标准答案:浸润性尿路上皮癌(巢状变异型)。

      这也提醒我们:诊断尿路上皮肿瘤,不能只熟记经典型形态。所有亚型(巢状、微囊型、微乳头型、淋巴上皮瘤样型、浆细胞样/印戒细胞样、肉瘤样、巨细胞型、低分化、富脂性、透明细胞型),都是日常诊断和职称考试的重中之重。

总结:尿路上皮肿瘤是泌尿系统最常见、形态繁杂、亚型多、容易踩坑的一类病变。很多特殊亚型肉眼看似温和、镜下极具欺骗性,极易发生漏诊、误诊熟练掌握各类亚型鉴别,既能规避日常工作误诊风险,也是病理规培、副高晋升考试的高频考点。你在日常工作中,遇到过最难分辨、最容易误诊的尿路上皮亚型是哪一种?欢迎评论区留言交流,互相学习、共同避坑!

声明:以上知识点来源于病理相关书籍及网络,仅用于个人学习,非诊疗用途,如有知识点疏漏,欢迎同仁指正,侵删。

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  1. CONNECT:[ UseTime:0.000606s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000782s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000331s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.006121s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000534s ]
  6. SELECT * FROM `set` [ RunTime:0.000886s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000596s ]
  8. SELECT * FROM `article` WHERE `id` = 483430 LIMIT 1 [ RunTime:0.000422s ]
  9. UPDATE `article` SET `lasttime` = 1777009914 WHERE `id` = 483430 [ RunTime:0.001188s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000225s ]
  11. SELECT * FROM `article` WHERE `id` < 483430 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000412s ]
  12. SELECT * FROM `article` WHERE `id` > 483430 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000367s ]
  13. SELECT * FROM `article` WHERE `id` < 483430 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002449s ]
  14. SELECT * FROM `article` WHERE `id` < 483430 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001224s ]
  15. SELECT * FROM `article` WHERE `id` < 483430 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000966s ]
0.128771s