Abstract

Mastocytosis are characterized by an abnormal tissular proliferation of mast cells in at least one visceral organ. Considering the accumulation of mast cells in the bone marrow, bone complications as osteoporosis with an increased risk of vertebral fractures can be observed. Bone involvement may also be the sole presentation of abnormal proliferation and the diagnosis of mastocytosis should be discussed in case of bone fragility in young patients. Bone complications are related to mast cell's infiltration and to mediators’ release by stimulated mast cells. Considering bone involvement, it is useful to assess bone mineral density (BMD) and to perform bone radiographs, for the assessment of vertebral fractures. There are very few data on the bone efficacy of mastocytosis treatments. Antiresorptive treatments as bisphosphonates are logical because of the key role of osteoclast and are indicated in patients with history of low trauma fracture and/or low BMD.

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