Description : Karyomegalic tubulointerstitial nephritis (KTN) is a rare kidney disease characterized
clinically by onset in the third decade of progressive renal failure. Renal biopsy
shows chronic tubulointerstitial nephritis and interstitial fibrosis associated with
enlarged and atypical tubular epithelial cell nuclei (summary by Baba et al., 2006).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the FANCD2/FANCI-associated nuclease 1 gene (FAN1, 613534.0001);
Laboratory abnormalities : Proteinuria; Glycosuria; Increased BUN; Increased creatinine; Abnormal liver function tests (in some patients); Hematuria (less common); Karyomegaly may be found in other visceral organs;