Comparison of clinicopathological features between patients with and without hypocomplementemia in IgG4-related kidney disease.

However, several radiologically characteristic lesions within the kidney have also been shown to be diagnostic for IgG4-RD affecting the kidney [[2]], and several glomerular lesions (especially membranous glomerulonephritis [[3]]) have been described as associated with IgG4-RD. Therefore the term "IgG4-related kidney disease" (IgG4-RKD) has been proposed as a comprehensive term for the renal lesions associated with IgG4-RD [[4]]. All of them were classified as having definite or probable IgG4-RKD according to the diagnostic criteria for IgG4-RKD 2020 [[9]] and/or as definite IgG4-RD according to the 2019 ACR/EULAR classification criteria [[2]]. [Extracted from the article]