Zika spotlights rare birth defect with a variety of causes

WASHINGTON (AP) — The Zika virus is putting a spotlight on a potentially devastating birth defect that until now has gotten little public attention.
Regardless of whether the mosquito-borne virus really causes babies to be born with abnormally small heads, a variety of other conditions trigger microcephaly. And, frustratingly, often there’s little way to predict what this condition will mean for children’s lives. Occasionally, babies just have smaller heads and otherwise are no