Disodium cromoglycate in the treatment of systemic mastocytosis involving only bone.

A 50-year-old woman with a 5-year history of low back pain and osteosclerosis was diagnosed as having systemic mastocytosis. She had no cutaneous or gastrointestinal manifestations of this disease. She was successfully treated with oral disodium cromoglycate. This is the first reported case of systemic mastocytosis involving only bone which responded to treatment with oral disodium cromoglycate.