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学习笔记:涎腺肿瘤病理副高备考复习

  • 2026-04-23 11:39:01
学习笔记:涎腺肿瘤病理副高备考复习

一、多形性腺瘤

1.多形性腺瘤由上皮、黏液样、软骨样成分构成的形态上多形性的肿瘤。

2.大小涎腺均可发生,以腮腺发生多见。

3.大体:圆形或结节状,边界清,有包膜。切面灰白,可有胶冻样半透明,浅蓝色软骨样。

4.镜下:

①由上皮、黏液样、软骨样成分构成。组织结构复杂多样,但没有筛状结构。

②上皮为双层管状结构,由腺上皮和肌上皮细胞构成。

③腺上皮呈立方状排列成管状。

④管腔周围为肌上皮细胞。肌上皮细胞可呈梭形、星状、胞质透明状、浆细胞样(肌上皮的多样,使得肿瘤呈多形性)。

5.免疫组化:

导管上皮细胞:CK、CEA、EMA阳性。

肌上皮细胞:p63、SMA、Calponin、S100阳性。

Ki67<5%。

6.鉴别诊断

①多形性腺瘤:是涎腺最多见的涎腺肿瘤。主要特点是结构的多形性,无浸润性生长,无神经侵犯,间质软骨样分化,缺乏筛状结构。 

②多形性腺癌:是以细胞形态的一致性、组织结构的多样性、浸润生长方式为特征的上皮性恶性肿瘤。特点为细胞的一致性和结构的多样性。细胞呈圆形或椭圆形,胞质比腺样囊性癌丰富。可见特征性的单列细胞排列或靶环状同心圆样结构。间质纤维组织可见玻璃样变。

癌在多形性腺瘤中:来自多形性腺瘤恶变,同时见良性多形性腺瘤 + 恶性癌变成分。恶变成分可以是各种唾液腺恶性肿瘤的表现,如腺样囊性癌、唾液腺导管癌、肌上皮癌。细胞显著异型,核大深染,核分裂易见,可见病理性核分裂,浸润性生长,可侵犯包膜/周围组织。局限于包膜内,称为非侵袭性癌;浸润周围组织<1.5mm,称为微侵袭性癌;浸润周围组织>1.5mm,称为侵袭性癌。

二、基底细胞腺瘤

1. 基底细胞腺瘤是基底样细胞构成的良性肿瘤。

2.边界清,包膜完整,切面灰白灰黄。

3.镜下:

①肿瘤由较单一的基底样细胞构成,细胞大小一致,胞质少,圆形或梭形。

②肿瘤排列成为实性型、巢状、条索状、腺管状、筛状。肿瘤外层细胞呈栅栏状排列,周围有基底膜样物。

4.免疫组化:

管腔细胞:CK、CK7、EMA阳性。

肌上皮细胞分化:p63、SMA、Calponin、S100阳性。

间质为纤维组织:S100阳。

三、腺样囊性癌

1. 腺样囊性癌是腺上皮、肌上皮细胞双向分化,具有管状、腺样和实性结构的恶性肿瘤。为涎腺常见的恶性肿瘤,多发生于腮腺和额腺,还可以发生于身体其他部位,如鼻腔鼻窦、咽喉部、眼眶、气管支气管及肺、皮肤、乳腺等。肿瘤早期常侵犯神经出现麻木或疼痛。

2. 大体:肿物小而硬,边界不清,肿瘤呈不规则形,与正常组织无明显界限。剖面呈灰白色,实性,较硬。  

3.镜下:

①肿瘤细胞由腺上皮细胞和肌上皮细胞构成。两种细胞均较小,核深染,胞质稀少,核分裂象少见。腺上皮细胞排列成管状;肌上皮成分占肿瘤的大部分,常为片状或围绕在管状结构外围,细胞核常呈角状。

②按肿瘤排列可分为3种类型,分别为筛状型、管状型、实体型。同一肿瘤中可见上述3种结构。

③肿瘤细胞常浸润神经纤维

4.免疫组化:腺样囊性癌有两种上皮构成,免疫组化能很好的勾勒出来。

腺上皮标记:CK7、EMA阳性。 

肌上皮标记:p63、SMA、Calponin、S100阳性。 

基底膜成分:IV型胶原、层粘连蛋白(Laminin)在筛孔中沉积。 

其他:CD117(c-KIT)常阳性,但非特异性。

小结:

1.基底细胞腺瘤:

包膜完整、单一基底样细胞、癌巢周边栅栏状、无黏液、无神经侵犯。

2.腺样囊性癌:

无包膜、腺上皮、肌上皮细胞双向分化、筛状、黏液样变、有神经侵犯。

四、黏液表皮样癌

1.由不同比例的黏液细胞、中间细胞、表皮样细胞构成的恶性肿瘤。多见于腮腺、颚及磨牙后区。

2.大体:高分化者界清,无完整包膜;低分化者界不清。

3.镜下:

①高分化:黏液细胞和表皮样细胞占10%以上,形成囊腔,常见乳头突入。

②低分化:以表皮样细胞和中间型细胞为主,黏液细胞低于10%, 可见神经侵犯、肿瘤坏死、核分裂。

③中分化:介于高和低分化之间,以中间型细胞和鳞状细胞为主。

总结:

一、最常见的涎腺上皮源性良性肿瘤→多形性腺瘤。

       最常见的涎腺恶性肿瘤→黏液表皮样癌。

二、涎腺肿瘤病理诊断,首先要看结构+细胞形态,再看就是间质与生长方式,应用免疫组化和增殖指数定性质。

声明:以上知识点来源于病理相关书籍及网络,仅用于个人学习记录,侵权删。有部分学习体会,如有错漏,望指出,谢谢。

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  1. CONNECT:[ UseTime:0.000401s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000685s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000294s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000285s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000637s ]
  6. SELECT * FROM `set` [ RunTime:0.000631s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000727s ]
  8. SELECT * FROM `article` WHERE `id` = 483153 LIMIT 1 [ RunTime:0.000418s ]
  9. UPDATE `article` SET `lasttime` = 1776935877 WHERE `id` = 483153 [ RunTime:0.001208s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000275s ]
  11. SELECT * FROM `article` WHERE `id` < 483153 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001657s ]
  12. SELECT * FROM `article` WHERE `id` > 483153 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000791s ]
  13. SELECT * FROM `article` WHERE `id` < 483153 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001595s ]
  14. SELECT * FROM `article` WHERE `id` < 483153 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001014s ]
  15. SELECT * FROM `article` WHERE `id` < 483153 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001503s ]
0.086149s