Tubulointerstitial nephritis without glomerular crescent formation as an underestimated subgroup of renal involvement among microscopic polyangiitis patients: A case report

Abstract

Although extra-glomerular involvement of microscopic polyangiitis is not regarded as a characteristic finding of the disease, tubulointerstitial nephritis should be considered as a new subclass of renal involvement.

Keywords: interstitial; microscopic polyangiitis; nephritis.