A newborn is being assessed for risk of hyperbilirubinemia. The infant has both caput succedaneum and a cephalohematoma. The nurse understands that phototherapy is more likely to be required in which condition, and why?

A. Caput succedaneum is incorrect because this condition is a diffuse swelling of the scalp that crosses suture lines and is caused by pressure during delivery. It usually resolves on its own within a few days and does not significantly increase bilirubin levels or require phototherapy. B. Neither condition increases bilirubin levels is incorrect because cephalohematoma can significantly elevate bilirubin due to red blood cell breakdown within the localized hematoma. While caput succedaneum has minimal impact, cephalohematoma can contribute to hyperbilirubinemia. C. Phototherapy is more likely needed with caput succedaneum is incorrect because the swelling in caput succedaneum does not contain trapped blood and therefore does not cause significant hemolysis or increase bilirubin levels. D. Cephalohematoma increases the risk of hyperbilirubinemia is correct because cephalohematoma is a collection of blood between the skull and periosteum that is confined by suture lines. The trapped red blood cells break down over time, releasing bilirubin into the bloodstream. This delayed bilirubin rise can become significant and often requires phototherapy to prevent complications such as kernicterus.