[Bone mastocytosis and osteomalacia. Apropos of a case with histodynamic analysis on non-decalcified bone].

A patient presented with cutaneous mastocytosis, bone pains, biologic disorders typical of osteomalacia, and intestinal malabsorption. Bone biopsy with histomorphometric analysis and measure of calcification rate on undecalcified bone, confirmed the diagnosis of bone mastocytosis and osteomalacia. There are only 2 other reports of osteomalacia caused by malabsorption. The latter is possibly bound to a mast-cell infiltrate of the intestinal mucosa. Sometimes only villosity atrophy or oedema of the mucosa are observed.