treatment, patients with more aggressive kidney involvement may require immunosuppressive therapy. Further studies are needed for revealing the relationship between FMF gene mutation and nonamyloid glomerular diseases.© 2015 ACT. All rights reserved. . Mutations of the MEFV gene, on the short arm of chromosome 16, codes for pyrin or marenostrin proteins is responsible for the disease. The MEFV mutation is found in less than 70% of patients diagnosed with FMF. Four mutations have been defined in 85% of patients from the mentioned 4 ethnic groups (M694V, M680I, M694I V726A) [3][4][5] . AA type amyloidosis is the result of serum amyloid A protein deposition in tissues. It is the best understood and the most serious reason for kidney failure in patients with FMF. In a report from Turkey, amyloidosis rates among FMF patients were found to be 7% [6] . There is no publication proving an increase of glomerulonephritis among FMF patients. ABSTRACT AIM: Kidney involvement is the most serious organ involvement of Familial Mediterranean Fever (FMF), while the most common cause is AA type amyloidosis with serum amyloid AA deposition. However, vasculitis and other types of glomerulonephritis (GN) also have been reported. With this study we evaluated biopsy proven non-amyloid glomerular diseases in patients with FMF. METHODS: At our Nephrology clinic, total 950 patients followed by diagnosis of FMF have been evaluated. Nine patients who had positive proteinuria ( >500 mg/day) but had negative amyloidosis in the tissue biopsy were made renal biopsy. RESULTS: Nine patients underwent a renal biopsy, two patients were found to have IgA nephropathy (IGAN), three mesangioproliferative glomerulonephritis (MsPGN), three membranous glomerulonephritis (MGN) and one had immune complex glomerulonephritis. Two patients with IGAN and one patient with MGN with non-nephrotic proteinuria exhibited significant improvement with colchicine and angiotensin receptor blocker (ARB) therapy. Other patients were treated with colchicine, an ARB and immunosuppressive drugs. Upon evaluation for the FMF gene mutation, different mutations have been found for the same glomerulonephritis type. CONCLUSIONS: Other glomerular causes also must be investigated alongside amyloidosis in the case of kidney involvement in FMF patients. While patients with IGAN and other glomerulonephrities with non-nephrotic proteinuria can respond well to colchicine
