The most important step in managing<unk><unk>  glomerulonephritis is rapid diagnosis. It is essential for organ preservation. Laboratory studies include,
complete blood cell count (CBC) with differential, serum electrolytes, BUN, creatinine, lactate dehydrogenase (LDH), creatine phosphokinase (CPK), and liver function tests: The most common abnormality is an increased serum creatinine level. However, the level can be normal at presentation. Tissue enzyme (ie, LDH, CPK) levels may be elevated if there is significant muscle inflammation and myalgias. Urinalysis with microscopy usually show proteinuria but is rarely greater than 2-3 g in 24 hours. Microscopic hematuria may be  present and may be the only clue to renal disease at presentation. The presence of red cell casts indicates glomerulonephritis and is a very helpful clue. Erythrocyte sedimentation rate is usually elevated with active disease. C-reactive protein levels are elevated and correspond with disease activity. High antinuclear antibody (ANA) titer rises the suspicion toward systemic lupus erythematosus. More than 80% of patients with microscopic polyangiitis are ANCA-positive. The symptoms of cryoglobulinemia are very similar to those of ANCA-related disease. However, in persons with ANCA-related diseases, the cryoglobulin titer result should be negative. Hepatitis profile should be performed as hepatitis B is associated with polyarteritis nodosa and hepatitis C is associated with mixed cryoglobulinemia. Urine and serum protein electrophoresis is done in any middle-aged or elderly person presenting with<unk><unk>  glomerulonephritis to exclude the presence of light-chain disease or noticeable multiple myeloma as a cause of the clinical findings.
Rapidly progressive glomerulonephritis laboratory findings
Membranoproliferative glomerulonephritis laboratory findings
Membranous glomerulonephritis laboratory findings
Focal segmental glomerulosclerosis laboratory findings
Rapidly progressive glomerulonephritis physical examination
Interstitial nephritis laboratory findings
Renal amyloidosis laboratory findings
Membranoproliferative glomerulonephritis physical examination