• Acute Kidney Failure
• Acute Phosphate Nephropathy
• Acute Tubular Necrosis
• Alport Syndrome
• Amyloidosis
• Bartter Syndrome
• Cholesterol Emboli
• Contrast Nephropathy
• Cryoglobuinemia
• Diabetes and Diabetic Kidney Disease
• Diabetes Insipidus
• Edema, Swelling
• Fabry's Disease
• Fibrillary Glomerulonephritis and Immunotactoid Glomerulopathy
• Focal Segmental Glomerulosclerosis, Focal Sclerosis, Focal Glomerulosclerosis
• Gestational Hypertension
• Gitelman Syndrome
• Glomerular Diseases
• Goodpasture Syndrome
• Hematuria (Blood in Urine)
• Hemolytic Uremic Syndrome
• High Blood Pressure and Kidney Disease
• Hyperaldosteronism
• Hypercalcemia (High Blood Calcium)
• Hyponatremia (Low Blood Sodium)
• Hyperoxaluria
• IgA Nephropathy
• Interstitial Cystitis, Painful Bladder Syndrome (Questionnaire)
• Interstitial Nephritis
• Kidney Stones
• Light Chain Deposition Disease, Monoclonal Immunoglobulin Deposition Disease
• Liddle Syndrome
• Loin Pain Hematuria
• Lupus, Systemic Lupus Erythematosis
• Lupus Kidney Disease, Lupus Nephritis
• Malignant Hypertension
• Medullary Cystic Kidney Disease
• Medullary Sponge Kidney
• Membranoproliferative Glomerulonephritis
• Membranous Nephropathy
• Metabolic Acidosis
• Microscopic Polyangiitis
• Minimal Change Disease
• Multiple Myeloma
• MYH9 Mutation
• Nephrocalcinosis
• Nephrotic Syndrome
• Nutcracker syndrome
• Orthostatic Hypotension
• Orthostatic Proteinuria
• Post-infectious Glomerulonephritis, Post-streptococcal Glomerulonephritis
• Polycystic Kidney Disease
• Preeclampsia
• Proteinuria (Protein in Urine)
• Pyelonephritis (Kidney Infection)
• Rapidly Progressive Glomerulonephritis
• Renal Artery Stenosis
• Renal Infarction
• Renal Tubular Acidosis
• Reflux Nephropathy
• Retroperitoneal Fibrosis
• Rhabdomyolysis
• Scleroderma Renal Crisis
• Thin Basement Membrane Disease, Benign Familial Hematuria
• Tumor Lysis Syndrome
• Urinary Tract Infection
• Urinary Tract Obstruction
• Wegener's Granulomatosis

Sources: Answers.com, The Johns Hopkins Vasculitis Center, Lupus Foundation of America, Mayo Clinic, MedlinePlus, National Cancer Institute, National Institute for Arthritis and Musculoskeletal and Skin Diseases, National Kidney and Urologic Diseases Information Clearinghouse, Quest Diagnostics Patient Health Library, Scleroderma Foundation, A Support Group for Rare Illnesses, UpToDate, Wikipedia, Merck Manual, eMedicine