The renal parenchymal changes common to all of the above conditions are marked chronic tubulointerstitial nephritis
, with disproportionately milder glomerular or vascular changes.
5) Polycystic kidney disease, n(%) 8 (20) Hypertensive nephropathy, n(%) 6 (15) Reflux nephropathy, n(%) 4 (10) Chronic tubulointerstitial nephritis
, n(%) 2 (5) Secondary amyloidosis, n(%) 2 (5) Post-nephrectomy, n(%) 1 (2.
8) Taken together, this suggests that dRTA associated with a positive anti-Ro antibody, typical chronic tubulointerstitial nephritis
and the exclusion of other autoimmune disorders may be the forme fruste of primary Sjogren syndrome, even without subjective sicca syndrome.