MSK – Knee

“Some types of tears, such as radial tears, may not be considered to be repairable. Radial tears are frequently treated with débridement.”

“In the retrospective analysis, four radiologic signs were used to detect radial tears: truncated triangle, cleft, marching cleft, and ghost meniscus signs. Retrospectively, using the four signs for radial tears, reviewers identified 17 (89%) of 19 radial tears.”

“The truncated triangle sign was defined as the abrupt termination of the normal triangular meniscal contour at its tip on a sagittal or coronal image. The cleft sign was defined as linear, vertical high signal extending through the meniscus on a coronal or sagittal image. Similarly, the marching cleft sign was defined as a cleft that was identified on consecutive sagittal or coronal images that “marched” centrally or peripherally on each adjacent image. The ghost meniscus sign was defined as the absence of identifiable meniscus on a given coronal or sagittal image or the visible triangular form of the meniscus but high signal replacing the normal dark meniscal signal, with normal meniscus seen on the immediately adjacent images.”