title: Cytodiagnosis of rheumatoid pleural effusion.
mesh_terms: D003581:Cytodiagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010996:Pleural Effusion; D010998:Pleurisy / Q000175:diagnosis*; D012218:Rheumatoid Nodule / Q000175:diagnosis*