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皮肤病理学习笔记05 —— 龟头肿物

  • 2026-02-07 12:55:20
皮肤病理学习笔记05 —— 龟头肿物

病 例 分 享

患者 男,61岁

主诉:阴茎肿块逐渐增大伴糜烂3年余

既往史及家族史:无殊。

皮肤科检查:龟头部可见1.5x3.0cm大小肿块,呈花菜状,不规则,表面覆有黄色痂壳,少部分糜烂。

组织病理:

1、核心病理特征

       肿瘤由异型增生的鳞状上皮细胞构成,细胞大小不一、多形性明显;细胞核大、深染、核质比增高,核仁显著,可见病理性核分裂象
诊断
浸润型鳞状细胞癌

讨    论

皮肤及皮肤黏膜附属器范畴的鳞状细胞癌谱系疾病,包含癌前病变、原位癌、浸润癌、遗传性易感疾病及皮肤专属临床 / 组织学亚型,是皮肤病理与临床诊疗的核心分类体系。

一、皮肤 SCC 相关疾病谱系(连续病变谱)

(一)皮肤鳞状细胞癌前病变

    均为表皮鳞状上皮异型增生,未突破基底膜、无侵袭性,进展为浸润性 SCC 风险不等:

1.光化性角化病(AK

    最常见皮肤癌前病变,紫外线诱导,好发头面、手背、颈部等光暴露部位;病理为表皮灶性异型增生、角化不全,约 **0.1%~10%** 进展为浸润性 SCC

2.砷角化病

    慢性砷中毒引发,掌跖部位多发性角化性丘疹 / 结节,表皮异型增生明显,继发 SCC 风险显著升高。

3.慢性炎症 / 瘢痕性癌前改变

    长期不愈的静脉溃疡、烧伤瘢痕、盘状红斑狼疮皮损处,上皮反复修复增生伴异型,为瘢痕癌前驱。

(二)皮肤原位鳞状细胞癌(SCCIS

    肿瘤细胞累及表皮全层异型增生,未突破基底膜,无转移潜能,根治预后极佳:

1.鲍温病(Bowen 病)

    全身皮肤均可发生,表现为边界清晰的暗红色鳞屑性斑块;病理示表皮全层非典型增生、角化不良,无真皮侵袭。

2.Queyrat 增殖性红斑

    专属外生殖器黏膜皮肤(龟头、外阴)的原位 SCC,红色湿润斑块,异型增生更显著,易进展为浸润癌。

(三)浸润性皮肤鳞状细胞癌

    肿瘤突破表皮基底膜,侵入真皮层,具备局部侵袭、区域淋巴结转移潜能,为临床主要恶性类型。

(四)遗传性皮肤 SCC 易感综合征

1.着色性干皮病(XP

    DNA 修复酶缺陷,对紫外线极度敏感,儿童期即可多发光化性角化病、SCC 及黑色素瘤。

2.疣状表皮发育不良(EV

    HPV3/5/8 型持续感染,泛发扁平疣样损害,肢端、光暴露部位易进展为 SCC

二、皮肤 SCC 临床亚型(按诱因 发病背景)

亚型

核心特征

恶性程度 / 转移风险

光化性皮肤 SCC

最常见,光暴露部位,继发于光化性角化病

低度恶性,转移率<5%

瘢痕癌(Marjolin 溃疡)

继发于烧伤、外伤、慢性溃疡瘢痕,潜伏期数年

侵袭性强,淋巴结转移率高

免疫抑制相关 SCC

器官移植、HIV、长期激素 免疫抑制剂使用者,皮损多发

侵袭性、复发率显著升高

皮肤疣状癌

外生性疣状结节,好发肢端、生殖器皮肤

低度恶性,几乎不转移

三、皮肤 SCC 组织学特殊亚型

    均为浸润性 SCC 的形态变异,需与其他皮肤肿瘤鉴别:

1.疣状癌

    高分化,外生性乳头状 / 疣状生长,细胞异型性轻微,无明显核分裂,侵袭表浅,极少转移。

2.梭形细胞鳞癌

    肉瘤样变异型,肿瘤以梭形鳞状细胞为主,伴少量角化珠 / 细胞间桥;侵袭性强,易误诊为皮肤肉瘤。

3.透明细胞鳞癌

     肿瘤细胞胞质因糖原蓄积呈透明样,需与皮肤透明细胞汗腺瘤、转移性肾透明细胞癌鉴别。

4.棘层松解性鳞癌

     表皮细胞间桥消失形成棘层松解腔隙,易误诊为腺样囊性癌、腺棘癌,侵袭性中等。

5.腺样鳞状细胞癌

     出现假腺样、腺泡样结构,分化较差,局部侵袭性强。

6.色素性鳞状细胞癌

     肿瘤细胞间伴黑色素细胞定植 / 黑色素沉积,临床易误诊为黑色素瘤,免疫组化可鉴别。

四、皮肤 SCC 诊断核心要点

1.病理金标准:可见鳞状细胞异型增生、角化珠、细胞间桥,浸润性 SCC 见肿瘤团块突破基底膜侵入真皮。

2.免疫组化:特异性标志物P40P63CK5/6阳性,排除腺癌、黑色素瘤。

3.鉴别诊断:基底细胞癌、角化棘皮瘤、 Bowen 病、恶性黑色素瘤、皮肤转移癌。

五、预后与治疗原则

1.预后分层:原位癌>光化性高分化 SCC>疣状癌>中低分化 SCC>瘢痕癌 梭形细胞亚型 免疫抑制相关 SCC

2.治疗

原位癌:手术切除、冷冻、激光、外用咪喹莫特 / 5 - 氟尿嘧啶;

浸润癌:手术切除为首选,高危部位 / 高侵袭型采用 Mohs 显微描记手术;

晚期 / 转移:放化疗、PD-1/PD-L1 免疫治疗。

1.随访:光暴露部位定期皮肤镜筛查,高危人群每 3~6 个月复查。

声明:以上知识点及图片部分来源于病理相关书籍及网络,仅用于个人学习记录,不代表一定全对。(此病例仅代表个人观点,不正确之处多批评指正,谢谢大家)
PS:欢迎大家关注,如果您喜欢,麻烦点赞、推荐和分享,谢谢大家。

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  1. CONNECT:[ UseTime:0.000600s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000710s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.006684s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.005045s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000778s ]
  6. SELECT * FROM `set` [ RunTime:0.000207s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000623s ]
  8. SELECT * FROM `article` WHERE `id` = 466590 LIMIT 1 [ RunTime:0.005293s ]
  9. UPDATE `article` SET `lasttime` = 1770540132 WHERE `id` = 466590 [ RunTime:0.000810s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000216s ]
  11. SELECT * FROM `article` WHERE `id` < 466590 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.013991s ]
  12. SELECT * FROM `article` WHERE `id` > 466590 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001569s ]
  13. SELECT * FROM `article` WHERE `id` < 466590 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000742s ]
  14. SELECT * FROM `article` WHERE `id` < 466590 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007753s ]
  15. SELECT * FROM `article` WHERE `id` < 466590 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.008939s ]
0.127812s