膜性肾小球肾炎，毛细血管袢明显增厚，但细胞并不增多。膜性肾小球肾炎是成年人肾病综合征最常见的原因。有些膜性肾小球肾炎和慢性感染（如乙型肝炎）、肿瘤或SLE有关。但多数病例是特发性的。
Here is the light microscopic appearance of membranous glomerulonephritis in which the capillary loops are thickened and prominent, but the cellularity is not increased. Membranous GN is the most common cause for nephrotic syndrome in adults. Some cases of membranous GN can be linked to a chronic infectious disease such as hepatitis B, a carcinoma, or SLE, but many cases are idiopathic.
