血管扩张Angiectasis · 膀胱 · 泌尿系统 · NTP ntp-0200
诊断要点：血管扩张应当诊断并给予严重程度分级。
病变描述
膀胱内的局灶性（focal）血管扩张可诊断为血管扩张（angiectasis）（Figure 1、Figure 2）。这些病变通常报告为自发性病变，但也有报道与血管扩张性化学物质相关。血管扩张常见于黏膜下层，表现为局灶性或多灶性（multifocal）的病变，往往形态不规则且边界不清。血管扩张必须与血管瘤（hemangioma）相鉴别。两者的区分并不总是显而易见：血管瘤往往为边界清楚、无包膜的肿块，由紧密排列的扩张血管腔构成，每个血管腔由单层形态正常的内皮细胞围成并衬覆，内皮细胞排列于薄层胶原性间质上。
诊断与分级建议（NTP 共识）
血管扩张应当诊断并给予严重程度分级。
图谱
英文原文
展开 NTP 官方英文描述与建议
Comment：
Focal blood vessel dilation in the urinary bladder may be diagnosed as angiectasis ( Figure 1 and Figure 2 ). These lesions are typically reported as spontaneous lesions but have been reported with vasodilating chemicals. Angiectasis is commonly noted in the submucosa as a focal or multifocal finding that tends to be irregular and not well circumscribed Angiectasis must be differentiated from hemangioma. The distinction is not always obvious: hemangiomas tend to be well circumscribed, unencapsulated masses composed of tightly packed dilated vascular spaces, each enclosed and lined by a single layer of normal-appearing endothelial cells aligned on a thin collagenous stroma.
Recommendation：
Angiectasis should be diagnosed and given a severity grade.
来源与引用
原始条目：https://ntp.niehs.nih.gov/atlas/nnl/urinary-system/urinary-bladder/Angiectasis
图谱总目录：NTP Nonneoplastic Lesion Atlas。 内容属美国联邦政府作品（公有领域），可引用；引用时请标注来源。
建议引用格式：NTP Nonneoplastic Lesion Atlas. Angiectasis (urinary-bladder). LabSmart 中文版：
https://www.labsmart.cn/ntp/urinary-bladder-angiectasis.html
中文图谱总页（可展开对照全部 595 条）：https://www.labsmart.cn/ntp-atlas.html#urinary-bladder-angiectasis