A selective intestinal malabsorption of magnesium  in an infant.
D002118:Calcium / Q000097:blood; D005243:Feces / Q000032:analysis; D006801:Humans; D007223:Infant; D007228:Infant Nutrition Disorders / Q000209:etiology*; D007231:Infant, Newborn; D007275:Injections, Intravenous; D007408:Intestinal Absorption; D008275:Magnesium Deficiency; D008286:Malabsorption Syndromes / Q000209:etiology*; D008297:Male; D011868:Radioisotopes; D012640:Seizures / Q000209:etiology; D013746:Tetany / Q000209:etiology; D014882:Water-Electrolyte Balance
D011868:Radioisotopes; D002118:Calcium