血管扩张Angiectasis · 阴道 · 雌性生殖系统 · NTP ntp-0567
诊断要点：阴道 - 血管扩张：只要存在即应诊断并分级。
病变描述
大鼠阴道内的扩张血管罕见观察到。当作为血管扩张（angiectasis）存在时，通常是一组显著的扩张血管，内衬单层内皮细胞，细胞核扁平（Figure 1、Figure 2）。应尝试区分血管扩张与血管瘤（hemangioma），尽管这种区分并不总是显而易见。血管瘤往往边界清楚、无包膜，由紧密排列的扩张血管腔隙构成。每个血管腔隙均由单层外观正常的内皮细胞围成并衬覆，这些内皮细胞排列于胶原性间隔上，间隔通常较薄，尽管部分具有宽阔的胶原性间质。相比之下，血管扩张通常不表现为边界清楚的肿块：扩张的血管通道不规则地穿行于组织中。
诊断与分级建议（NTP 共识）
阴道 - 血管扩张：只要存在即应诊断并分级。
图谱
英文原文
展开 NTP 官方英文描述与建议
Comment：
Dilated vessels in the rat vagina are rarely observed. When present as angiectasis, they are usually a collection of prominent dilated blood vessels lined by a single layer of endothelium with flattened nuclei ( Figure 1 and Figure 2 ). A distinction between angiectasis and hemangioma should be attempted, although the distinction is not always obvious. Hemangiomas tend to be well-circumscribed, unencapsulated masses composed of tightly packed, dilated vascular spaces. Each vascular space is enclosed and lined by a single layer of normal-appearing endothelial cells aligned on collagenous septa, which are usually thin, although some have broad collagenous stroma. In contrast, angiectasis does not usually present a well-circumscribed mass: the dilated vascular channels course irregularly through the tissue.
Recommendation：
Vagina - Angiectasis should be diagnosed and graded whenever present.
来源与引用
原始条目：https://ntp.niehs.nih.gov/atlas/nnl/reproductive-system-female/vagina/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 (vagina). LabSmart 中文版：
https://www.labsmart.cn/ntp/vagina-angiectasis.html
中文图谱总页（可展开对照全部 595 条）：https://www.labsmart.cn/ntp-atlas.html#vagina-angiectasis