The Papanicolaou Society of Cytopathology guidelines for respiratory cytology: Reproducibility of categories among observers

The Papanicolaou Society of Cytopathology (PSC) has developed a set of guidelines for reporting respiratory cytology. While the malignancy risk for each category is known, the interobserver reproducibility of these diagnostic categories has not been well described.Fifty-five cytologic specimens obtained by fine needle aspiration from the pulmonary nodules were independently reviewed by four board-certified cytopathologists and assigned to the...