Migratory multiple bone involvement in a patient with systemic mastocytosis.

A young patient with severe generalized osteopenia and multiple compressed vertebral fractures caused by systemic mastocytosis is presented. Extensive clinical, laboratory, and pathologic examination showed the involvement of the skeleton alone. Follow-up bone scintigraphy with Tc-99m MDP during a period of 6 years demonstrated migratory multiple axial lesions. These results suggest that Tc-99m MDP imaging is an accurate detection of the activity of the disease.