Hypophosphatemia - Differential Diagnosis Algorithm Transcellular Shift • Recovery From DKA • Refeeding Syndrome • Acute Respiratory Alkalosis • Hypokalemia • Hypomagnesemia • Burns Increased Excretion - GI: • Small bowel diarrhea • Enteric Fistula Increased Excretion - Renal FE PO4 > 5%: • Hyperparathyroidism • Vitamin D Deficiency/Resistance • Hypophosphatemic Rickets • Oncogenic Osteomalacia • Fanconi Syndrome • Osmotic Diuresis • Acute Volume Expansion • Acetazolamide and Thiazide Diuretics Decreased Intake - Dietary deficiency: • Anorexia • Chronic Alcoholism Decreased Intake - Malabsorption: • Aluminum/Magnesium Containing Antacids • Inflammatory Bowel Disease • Steatorrhea • Chronic Diarrhea #Hypophosphatemia #LowPhosphate #Differential #Diagnosis #Algorithm #endocrinology #causes
