Lupus erythematosus cells in pleural fluid cytologic diagnosis in two patients.

Lupus erythematosus (LE) cells were demonstrated inpleural fluids from two patients with systemic lupus erythematosus (SLE). They were observed in preparations stained with the Giemsa and the Papanicolaou stains. The finding of LE cells in serous fluid has rarely been reported. Our results suggest that it is imporant to search for LE cells in serous fluid in patients in whom the diagnosis of SLE has not been established.