Bottom Line: Sensitivity of ascitic cytology is approximately 60%, and the sensitivity of pleural effusion cytology is approximately 50%.
Karoo RO, Lloyd TD, Garcea G, Redway HD, Robertson GS. How valuable is ascitic cytology in the detection and managent of malignancy. Postgrad Med. 2003 May;79(931):292-294. Study included 276 samples.
Motherby H, Nadjari B, Friegel P, Kohaus J, Ramp U, Bocking A. Diagnostic accuracy of effusion cytology. Diagn Cytopathol. 1999 Jun;20(6):350-357. Study included 300 pleural effusions and 300 ascitic effusions and provides sensitivity for both types of effusions.