常见肾上腺肿瘤的ct诊断与鉴别诊断课件.pptx
《常见肾上腺肿瘤的ct诊断与鉴别诊断课件.pptx》由会员分享,可在线阅读,更多相关《常见肾上腺肿瘤的ct诊断与鉴别诊断课件.pptx(39页珍藏版)》请在淘文阁 - 分享文档赚钱的网站上搜索。
1、Ihr Logo常见肾上腺肿瘤的常见肾上腺肿瘤的CT诊断与诊断与鉴别诊断鉴别诊断CT Diagnosis and Differential Diagnosis of Common Adrenal TumorsYour LogoHere comes your footer Page 2 球状带:盐皮质激素(醛固酮)肾上腺皮质从外向里分为束状带:糖皮质激素(皮质醇) 网状带:性激素(脱氢雄酮、雌二醇) 肾上腺素:心跳加快,收缩加强肾上腺髓质主要分泌 去甲肾上腺素:小动脉平滑肌收缩 Your LogoHere comes your footer Page 3正常肾上腺正常肾上腺CT表现表现1、位置:
2、位于两侧肾脏上方,约T11、T12椎体水平。2、形态:多为倒V形或倒Y形。3、大小:正常侧枝厚度10mm(不超过同层膈肌脚) 面积150mm2。4、密度:均匀软组织密度,30-50HU,不能分辨皮髓 质。5、增强:均匀强化,仍不能分辨皮髓质。Your LogoHere comes your footer Page 4Contents1、神经母细胞瘤2、嗜铬细胞瘤3、转移瘤4、皮质腺瘤5、皮质腺癌6、髓样脂肪瘤Your LogoHere comes your footer Page 55-year-old boy, complained with abdominal massYour LogoH
3、ere comes your footer Page 6Your LogoHere comes your footer Page 7Your LogoHere comes your footer Page 8神经母细胞瘤神经母细胞瘤(Adrenal Neuroblastoma)儿童腹膜后最常见的实体性恶性肿瘤之一,多在5岁内发病,肾上腺为其主要发病部位。临床症状不典型,常以“腹部包块”就诊。85%-90%患儿尿中VMACT:平扫为不规则较大较大肿块,呈侵润性生长,多见斑片样钙化钙化,钙化程度不 同,肿块可见坏死,囊变,出血,常跨越中线跨越中线向对侧延伸,包绕后腹膜包绕后腹膜 血管血管,也可突入
4、胸腔,增强后实质部分不均匀强化。肾脏常被压迫向后 外侧移位。 如实验室检查有尿3-甲氧-4羟杏仁酸(VMA)升高 ,CT征象具有上述任何 一种典型表现就可以考虑肾上腺神经母细胞瘤。 常需与肾母细胞瘤鉴别Your LogoHere comes your footer Page 9肾母细胞瘤肾母细胞瘤神经母细胞瘤神经母细胞瘤生长方式生长方式膨胀性生长,完整假包膜,较少分叶生长迅速,多无完整包膜,分叶常见平扫平扫密度明显低于肾实质,囊变多见,极少钙化钙化多见,囊变少增强增强血供不丰富,不明显强化较明显强化与肾脏关系与肾脏关系与残肾交界面锐利交界面模糊,境界不清转移转移瘤周组织多成推移表现,腹膜后淋巴
5、结转移少见常包埋后腹膜血管,腹膜后淋巴结转移常见Your LogoHere comes your footer Page 10肾母细胞瘤Your LogoHere comes your footer Page 11肾上腺嗜铬细胞瘤肾上腺嗜铬细胞瘤(Pheochromocytomas )1、Pheochromocytomas are sometimes called the 10% tumor. Because they are associated with a 10% risk of malignancy, 10% of the tumors are bilateral, 10% are h
6、ormonally inactive and 10% are extra-adrenal.2、Pheochromocytomas are paragangliomas arising from the adrenal medulla. They are hormonally active in 90% of cases. Morphologic findings on CT include large variation in size, homogeneity, and margination of the tumors and significant enhancement in most
7、 cases. 3、Usually, tumors are larger than 3 cm when seen. They are highly vascular, and larger tumors are prone to hemorrhage and necrosis, even when they are benign.Mean age of Pheochromocytomas is 30 to 50 years old, theres no great difference in the sex of patients.Your LogoHere comes your footer
8、 Page 12平扫,肿瘤呈类圆形,不均匀低密度,有明显包膜病病例例1Your LogoHere comes your footer Page 13增强扫描动脉期,肿瘤呈明显结节状,显著强化Your LogoHere comes your footer Page 14增强扫描延迟期,肿瘤呈向心性强化,强化区密度高于背部肌肉组织Your LogoHere comes your footer Page 15左侧肾上腺可见一软组织块影,密度均匀,边界清晰,其内可见斑点状低密度血管影(箭),CT值约25 HU,胰腺尾部前移。病病例例2Your LogoHere comes your footer Pa
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 常见 肾上腺 肿瘤 ct 诊断 鉴别 课件
限制150内