Lupus nephritis emerging during remission of minimal change disease.
BACKGROUND
Rare cases of association between lupus nephritis (LN) and minimal changes nephrotic syndrome (MCNS) were described. Some authors suggest that this association, taking into account the low prevalence of both diseases, may not be a simple coincidence. Several pathophysiological hypotheses have been proposed to explain this association, including a potential central role of T lymphocytes.


METHODS
We describe the case of a 21 years-old female patient who initially presented with isolated nephrotic range proteinuria. She had no evidence of systemic involvement and Immunological tests were negative, including anti-neutrophil antibodies (ANA) and anti-double-stranded DNA antibodies (Anti-dsDNA). Renal biopsy showed normal glomeruli under light microscopy and no significant deposits were found in immunofluorescence studies. She was diagnosed to have MCNS and responded to a short course of steroids. She remained in remission for three years, after which she presented again with nephrotic-range proteinuria accompanied by clinical signs of systemic involvement. During her second presentation, she fulfilled the diagnostic criteria of systemic lupus erythematosus (SLE) and another kidney biopsy showed class-V lupus nephritis. She was treated with pulse steroids followed by oral prednisolone and mycophenolate mofetil, with good clinical response.


CONCLUSIONS
This case indicates that relapses of MCNS should be carefully investigated in the right setting to avoid missing a systemic disease such as SLE.
Department of Nephrology, Dialysis and Transplantation, Military Hospital Mohammed V, Rabat, Morocco.
Amine Mohamed
AM
Hamzi
Department of Nephrology, Dialysis and Transplantation, Military Hospital Mohammed V, Rabat, Morocco.
Ahmed
A
Alayoud
Department of Nephrology, Dialysis and Transplantation, Military Hospital Mohammed V, Rabat, Morocco.
Driss
D
El Kabbaj
Department of Nephrology, Dialysis and Transplantation, Military Hospital Mohammed V, Rabat, Morocco.
Mohamed
M
Benyahia
D000974:Antibodies, Antinuclear / Q000276:immunology; D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000150:complications*; D008181:Lupus Nephritis / Q000209:etiology*; D009173:Mycophenolic Acid / Q000008:administration & dosage / Q000031:analogs & derivatives; D009402:Nephrosis, Lipoid / Q000150:complications*; D011239:Prednisolone / Q000008:administration & dosage; D011507:Proteinuria / Q000209:etiology; D055815:Young Adult
D000974:Antibodies, Antinuclear; D011239:Prednisolone; D009173:Mycophenolic Acid