Behçet's disease and Takayasu's disease in children.

Behçet's disease and Takayasu's disease in children are uncommon and may have an insidious course leading to a delayed diagnosis. Both diseases usually occur in late childhood, although disease onset in the first year of life has been reported. Compared with adults, Behçet's disease in children appears to be characterized by a lower incidence of ocular and vascular involvement, and Takayasu's disease by a higher incidence of systemic symptoms. The reported characteristics of both diseases in children are reviewed.