Langerhans cell morphology trait Langerhans cell quantity Langerhams cell number The proportion or number of stellate dendritic cells of myeloid origin, that appear clear on light microscopy and have a dark-staining, indented nucleus and characteristic inclusions (Birbeck granules) in the cytoplasm; Langerhans cells are found principally in the stratum spinosum of the epidermis, but they also occur in other stratified epithelia and have been identified in the lung, lymph nodes, spleen, and thymus. Trait.ontology VT:0008119 number of Langerhans cells