基层

Hemorrhage into the decidua basalis, formed retroplacental hematoma, lead to the separation of the placenta. 一)主要病理变化:底蜕膜出血，形成血肿，使胎盘自附着处剥离。

Transurethral Resection Syndrome After Bladder Perforation (Case Report) Ihab Dorotta, Ayman Basali, Michael Ritchey, Jerome F. O'Hara, Jr. 在膀胱穿孔后的经尿道切除综合症(病例报告)

Dissection is then carried posteriorally along the inferior border of the ethmoid to the lamina basalis.Through the lamina basalis lies the posterior ethmoid. 接著向后沿筛窦的下缘切除筛窦至基板，通过基板即进入后组筛窦。

Long T 1 and T 2 signal intensity was showed on MR in central pontine,focus presented under cortex cerebri and in nucleus basalis area in 4 cases. 3 cases enhanced around focus,2 cases enhanced in center and 4 cases no enhanced on postcontrast MRI. MRI均表现桥脑中央长T1 及长T2 信号 ,4例伴有皮层下白质及基底节病灶 ,3例病灶周边强化 ,2例病灶中央显著强化 ,4例不强化。

lamina basalis corporis ciliaris 睫状体基底层

bronchi segmentalis basalis anterior [医] 肺底前段支气管