J Korean Soc Endocrinol.  1994 Mar;9(1):25-31.

Sporadic Nonfamilial Hypophosphatemic Osteomalacia

• Shong YK
• Park JY
• Kim GS
• Cho YS
• Cho GY
• Kim SW
• Park JS
• Lee KU

Abstract

Chronic hypophosphatemia caused by decreased intestinal absorption or increased renal clearance, may lead to rickets or osteomalacia independently of other predisposing abnormalities. The conditions commonly associated with increased renal clearance of phosphate are X-linked hypophosphatemic rickets, tumor associated rickets/osteomalacia, RTA and Fanconi syndrome. Recently we experienced 3 men with adult-onset, histologically proven osteomalacia associated with increased renal clearance of phosphate. None of them had a family history of bone disease, tumors or other tubular defects. All of these had remarkable biochemical and clinical improvement with medical treatment such as 1, 25-dihydroxyvitamin D and phosphate supplementation. Although we did not find tumors yet, we could not rule out the possibility of tumor-associated osteomalcia since it often takes several years to make a diagnosis because of small size, benign nature and unusual location of tumors. Thus, careful long-term follow up for tumor occurrence will be maintained in these patients with sporadic nonfamilial hypophosphatemic osteomalacia.

MeSH Terms

Bone Diseases
Diagnosis
Familial Hypophosphatemic Rickets
Fanconi Syndrome
Follow-Up Studies
Humans
Hypophosphatemia
Intestinal Absorption
Male
Osteomalacia*
Rickets