A low serum inorganic phosphorus can be due to a number of conditions.
Conditions associated with hypophosphatemia include:
acidosis, including diabetic ketoacidosis
acute alcoholism
acute gout
acute liver failure
dialysis
diuretic phase of severe burns
familial hypophosphatemic rickets
Gram-negative sepsis
growth hormone deficiency
hyperalimentation with insufficient phosphate
hypercalcemia, including familial hypocalciuric hypercalcemia
hyperparathyroidism (primary, secondary or paraneoplastic)
hypokalemia
insulin
malabsorption or steatorrhea
osteoblastic metastases
primary hypophosphatemia
refeeding syndrome (phosphorus depletion syndrome)
renal tubular acidosis or renal tubular defects
respiratory alkalosis
salicylate poisoning
severe diarrhea
starvation or malnutrition
steroid excesss (glucocorticoids, anabolic, Cushing syndrome)
vitamin D deficiency
vomiting or nasogastric suction
