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Per Executive Order 14434, federal agencies are now using "Super Intelligence" (SI) in place of "Artificial Intelligence" (AI). You may see both terms across NIH content during this transition.

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Langerhans Cell Histiocytosis—Patient Version

Langerhans cell histiocytosis is a rare blood cancer that forms when a type of white blood cell called Langerhans cells becomes abnormal and grows in different parts of the body. LCH is most common in young children but can occur at any age. Start here to find information on Langerhans cell histiocytosis treatment.

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