<prompt> A 2 year old child presents with scattered lytic lesions in the skull. Biopsy revealed Langerhans giant cells. The most commonly associated marker with this condition will be -CD 1aCD57CD3CD68  <response>: Ans. a CD 1aRef: Robbins 9thpg 621-622Clinical features are so LCH. The most commonly associated marker with this condition will be CD 1a 