血管扩张Angiectasis · 阴蒂腺 · 雌性生殖系统 · NTP ntp-0557
诊断要点：阴蒂腺——血管扩张：只要存在即应作出诊断并分级。
病变描述
在血管扩张（angiectasis）中，原有的阴蒂腺血管扩张并充满血细胞，伴有阴蒂腺实质的受压（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。血管瘤往往为边界清楚、无包膜的肿块，由紧密排列的扩张血管腔隙构成。每个血管腔隙均由单层形态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，但部分具有宽阔的胶原性间质。血管扩张通常不表现为边界清楚的肿块：扩张的血管通道常不规则地穿行于组织中。血管扩张和血管瘤均可发生邻近实质的受压。
诊断与分级建议（NTP 共识）
阴蒂腺——血管扩张：只要存在即应作出诊断并分级。
图谱
英文原文
展开 NTP 官方英文描述与建议
Comment：
In angiectasis, preexisting clitoral gland blood vessels become dilated and filled with blood cells, accompanied by compression of the clitoral gland parenchyma ( 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. Angiectasis does not usually present as a well-circumscribed mass: the dilated vascular channels often course irregularly through the tissue. Compression of adjacent parenchyma may occur in both angiectasis and hemangioma.
Recommendation：
Clitoral gland - 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/clitoral-gland/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 (clitoral-gland). LabSmart 中文版：
https://www.labsmart.cn/ntp/clitoral-gland-angiectasis.html
中文图谱总页（可展开对照全部 595 条）：https://www.labsmart.cn/ntp-atlas.html#clitoral-gland-angiectasis