title: Intrathoracic extramediastinal cystic hygroma.
abstract: A case of intrathoracic, extramediastinal cystic hygroma presenting with pneumonia in a 6 year old boy is described.
mesh_terms: D002648:Child; D006801:Humans; D008202:Lymphangioma / Q000175:diagnosis*; D008297:Male; D013899:Thoracic Neoplasms / Q000175:diagnosis*