Clinical and arthrographic findings in meniscal cysts.

Fifty meniscal cysts (36 lateral and 14 medial) were found in a review of 2,522 knee arthrograms. Thirty-eight cysts presented as a palpable bulge. In all cases characteristic horizontal tears extended into the periphery, with pooling of contrast material and club-shaped terminations. The differential diagnosis of a bulge around the knee joint is discussed. Arthrographic evaluation is valuable in determining appropriate treatment.