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Increased rate of hemangiomas linked to rise in number of low birth weight infants in US.
Low birth weight is the most significant factor for the development of infantile hemangiomas, a common birthmark, according to a new study by researchers at The Medical College of Wisconsin and Children's Research Institute (see also Medical College of Wisconsin).
The study, led by Beth Drolet, M.D., professor of dermatology and pediatrics at the Medical College and medical director of pediatric dermatology and birthmarks and vascular anomalies clinic at Children's Hospital of Wisconsin, is published in the November 2008 issue of The Journal of Pediatrics.
"Hemangiomas are benign tumors composed of blood vessels. Our institution has seen a dramatic increase in the number of infants presenting for care with hemangiomas. We believe the results of this study provide an explanation for this emerging pediatric health issue," says Dr. Drolet.
While factors such as being female, Caucasian and premature birth have been previously identified as risk factors for hemangiomas, Dr. Drolet's study found that low birth weight was the most statistically significant risk factor.
"For every 1.1 pound decrease in birth weight, the risk of hemangioma increased by nine-fold," says Dr. Drolet.
Recently, there has been an increase in the U.S. of infants born under 5.5 pounds. In 2005, 8.2 percent of infants born in the U. S. weighed less than 5.5 pounds. This is the highest percentage recorded since 1968 and is higher than the rate in most industrialized countries.
Additionally, a dramatic increase in low birth weight has been found in white, non-Hispanic infants. Low birth weight has increased 38 percent since 1990 in this group.
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Source: HighBeam Research, Increased rate of hemangiomas linked to rise in number of low birth...