Partial lipodystrophy, C3 nephritic factor and clinically inapparent mesangiocapillary glomerulonephritis.

A case of partial lipodystrophy with C3 nephritic factor was found to be associated with mesangiocapillary glomerulonephritis although all clinical parameters of renal function were normal. Diagnosis of mesangiocapillary glomerulonephritis required renal biopsy. Nephriti factor obtained from this patient was immunochemically related to nephritic factor isolated from the serum of patients with typical mesangiocapillary glomerulonephritis without partial lipodystrophy.