壁层上皮细胞形成新月体性肾炎的肾小球，新月体从四周挤压毛细血管丛。快速进行性肾小球肾炎可以是特发的，也可以来自SLE、感染后肾小球肾炎（如在某些链球菌感染后的肾炎）或各种类型的血管炎及Goodpasture综合征(肺出血-肾炎综合征)。
Here is another glomerulus with epithelial crescents squashing the glomerular tufts from all sides. RPGN may be idiopathic or may result from SLE, post-infectious GN (as in some cases of post-streptococcal GN), from various types of vasculitis, and from Goodpasture's syndrome.
