Value of the bone scintigraphy in multiple osteochrondromatosis with sarcomatous degeneration.

Multiple osteochondromatosis can become malignant in 20% of the cases, this being more common when the lesion is multiple than when it is solitary. A male patient with multiple osteochondromatosis who had several local recurrences of secondary chondrosarcoma and who is still under follow-up by the Nuclear Medicine Department is presented. The bone scintigraphy findings were compared with the histopathologic results, and the importance of the patient's symptoms was verified when a sarcomatous transformation is suspected. The bone scintigraphy has the potential to detect malignization of the benign bone lesions. It also makes it possible to obtain whole-body images in a single examination, this being very useful to detect the presence of new bone lesions.