Journal of Korean Endocrine Society 1999;14(2):401-409.
Published online January 1, 2001.
A Case of Osteosarcoma induced Oncogenic Osteomalacia Detected by MRI.
Sung Kil Lim, Young Duk Song, Hyun Chul Lee, Kap Bum Huh, Ki Hyun Park, Kyung Rae Kim, Soon Won Hong, Jae Hyun Nam, Jong In Yook, Byung Joo Choi, Mi Kyung Kim, Kyu Ho Shin
Oncogenic osteomalacia is a syndrome characterized by phosphaturia, hypophosphatemia, decreased 1,25-dihydroxyvitamin D level and specific signs and symptoms of osteomalacia. It is associated with the presence of neoplasm originated from mesenchyme. Until now, less than 100 cases of oncogenic osteomalacia have been reported. The pathophysiology of oncogenic osteomalacia has not been fully understood, but it has been suggested that a certain substance released by tumor may inhibit not only la-hydroxylase activity and reduce 1,25-dihydroxyvitamin D level in part, but directly inhibit reabsorption of phosphate. And then, reduced phosphaturia, hypophosphatemia and eventually osteomalacia develop. We report a case of osteosarcoma induced oncogenic osteomalacia detected by MRI in 59 year old woman.
Key Words: Oncogenic osteomalacia, Phosphaturia, Osteosarcoma, Hypophosphatemia

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