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    Langerhans Cell Histiocytosis Treatment (PDQ®): Treatment - Health Professional Information [NCI] - Treatment of Adult LCH

    Standard Treatment Options

    The lack of clinical trials limits the ability to make evidence-based recommendations for adult patients with Langerhans cell histiocytosis (LCH).

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    Most investigators have previously recommended treatment according to the guidelines given above for standard treatment of children with Langerhans cell histiocytosis. It is unclear, however, whether adult LCH responds as well as the childhood form of the disease. In addition, the drugs used in the treatment of children are not as well-tolerated when used in adults. Excessive neurologic toxicity from vinblastine, for example, prompted closure of the LCH-A1 trial.

    A consensus opinion reported on the evaluation and treatment of adult patients with LCH.[1] Discussion continues, however, particularly with regard to optimal first-line therapy with some experienced clinicians preferring to start with vinblastine and prednisone and others with alternative therapy, such as single-agent cytosine arabinoside or cladribine.

    Treatment of pulmonary LCH

    It is difficult to judge the effectiveness of various treatments for pulmonary LCH because patients can recover spontaneously or have stable disease without treatment. Smoking cessation is mandatory because the apparent causal effect of smoking in pulmonary LCH.[2] It is not known if steroid therapy is efficacious in the treatment of adult pulmonary LCH because reported case series did not control for smoking cessation. Most adult patients with LCH have gradual disease progression with continued smoking. The disease may regress or progress with the cessation of smoking.[3] Some patients have been reported to respond to cladribine therapy.

    Lung transplantation may be necessary for adults with extensive pulmonary destruction from LCH.[4] This multicenter study reported 54% survival at 10 years posttransplant, with 20% of patients having recurrent LCH that did not impact survival; longer follow-up of these patients is needed. Another study confirmed an approximate 50% survival at 10 years and improved hemodynamic changes associated with pulmonary arterial hypertension, but did not alter pulmonary function testing or incidence of pulmonary edema.[5] The best strategy for follow-up of pulmonary LCH includes physical examination, chest radiographs, lung function tests, and high-resolution computed tomography (CT) scans.[6]

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