CD1A and Langerhans cell histiocytosis: A Kruskal-Wallis test was conducted to compare the mean ranks of the percentage of CD1a+/CD3+ cells for LCH lesions (n = 6, 8.3±8.8), LCH peripheral blood tissues (n = 9, 0.0±0.0), and control tissues (n = 15, 0.0±0.0).