Diagnostic thoracotomy in the study of "idiopathic" pleural effusion.
D004194:Disease; D005122:Exudates and Transudates; D006801:Humans; D010994:Pleura; D010995:Pleural Diseases; D010996:Pleural Effusion; D013908:Thoracotomy; D013909:Thorax / Q000601:surgery*
PLEURA/diseases; THORAX/surgery