Meniscal abnormalities: prospective correlation of double-contrast arthrography and arthroscopy.

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Abstract
In a prospective study conducted over a 12-month period, 30 patients underwent double-contrast arthrography of the knee followed by arthroscopic study. An 80% correlation rate was found between results. Arthrography had a higher rate of accuracy (93%) than arthroscopy (84%) and had a 7% false-positive and 0% false-negative rate. A commonly overlooked arthrographic sign - the triple-S or stuck sail sign - was 91% accurate in the prediction of meniscal tears. The complementary nature of the two examinations is discussed.