Slow acclimation to hot weather and avoiding heavy exercise will reduce the chance of prickly heat.

progeria A rare condition characterized by an appearance of accelerated aging in children. The classic type of this disease is the Hutchinson-Gilford progeria syndrome first described in England in 1886 by Dr. Jonathan Hutchinson, and again in 1886 and 1904 by Dr. Hastings Gilford. The condition occurs in about one out of every four million newborns, in both boys and girls of all races. Since the condition was first described, more than 100 cases have been identified around the world. There is no cure or specific treatment available, although the mutant gene that causes the condition has recently been identified.

Children with progeria appear normal at birth, but by 18 months they begin to develop symptoms of accelerated aging. The skin begins to dry and wrinkle, bones become fragile, and most children are bald by the age of four. The children never grow much taller than three feet, and their internal organs also quickly age. Death is usually caused by heart disease or stroke at an average age of 13. Even as teenagers, children with progeria will weigh only 30 to 35 pounds.

Although the disease was first identified in 1886, it has been difficult to study because there are only a handful of patients alive at any one time. About one patient with progeria is born each year in the United States.

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