 This study examined the morphology of IgN in Middle Eastern patients and found that males had higher rates of segmental glomerulosclerosis and interstitial fibrosis slash tubular atrophy than females. Additionally, the presence of crescents correlated significantly with increased levels of serum creatinine, suggesting that extracapillary proliferation may be a new variable in the Oxford MESS classification system. This article was authored by Hamid Nasseri, Majkin Mordazavi, Ali Gorbani, and others.