Pulmonary dirofilariasis in a patient with multisystem Langerhans cell histiocytosis--the first reported case in Thailand.

: Despite a high prevalence of canine dirofilariasis, there is no case of pulmonary dirofilariasis reported from Thailand. We herein report a case of multisystem Langerhans cell histiocytosis who had an incidental pulmonary dirofilariasis found at the time of autopsy as a solitary nodule at the periphery of the right lower lobe. This is the first reported case in Thailand. Association between pulmonary dirofilariasis and Langerhans cell histiocytosis has not been described before in the literature.