title: Langerhans cell histiocytosis of the sacrum.
abstract: Langerhans cell histiocytosis is a rare disease with a wide spectrum of clinical presentations. It is a multisystemic disease with organ system involvement ranging from simple-where it involves only one organ-to widespread progressive disease. Although it can affect any age group, the peak incidence is between 1 and 3 years of age.
authors.forename: M A
authors.initials: MA
authors.lastname: Hatem