Abnormal Bowman capsule morphology Periglomerular fibrosis 2019-02-26T14:20:31Z Periglomerular fibrotic thickening PMID:32866505 Circumferential fibrosis in the interstitium surrounding Bowman's capsule Periglomerular fibrosis is characterized by glomeruli with open capillaries, but lamellated, frequently wrinkled, Bowman capsular basement membrane and circumferential layers of interstitial-type collagen around, within, or between the usually thickened, frequently lamellated, Bowman capsule basement membrane.