Noun
Langerhans cell (plural Langerhans cells)
A dendritic cell of the skin and mucosa, containing Birbeck granules, and present in all layers of the epidermis but most prominent in the stratum spinosum.
At first, doctors weren't sure if it was AML or Langerhans cell histiocytosis (LCH) which is another rare cancer from abnormal blood cells produced by bone marrow. Source: Internet