<prompt> Answer this question truthfullyWhat information is currently available regarding Langerhans cell histiocytosis?  <response>: <reason> The tumors produce a punched-out look on a bone x-ray. Specific tests vary depending on the age of the patient.Tests in children may also include:Biopsy of skin to check for the presence of Langerhans cells Bone marrow biopsy to check for the presence of Langerhans cells Complete blood count CBC X-rays of all the bones in the body skeletal survey to find out how many bones are affectedTests in adults may include:Bronchoscopy with biopsy Chest x-ray Pulmonary function testsHistiocytosis X is sometimes associated with cancer. CT scans and biopsy should be done to rule out possible cancer. 