Cell viability was reduced at meniscal tear sites. A-D) Representative cell viability images of LM (A & C) and MM (B & D) from control (top panel) and impacted (middle panel) knees. Increased cell death (red cells) was appreciable at tear edge of the impacted LM. E) Cell viability of impacted limbs was significantly reduced in LM with impaction compared to control. Data is shown as percentage of cell viability of control or impacted limbs normalized to the percentage of cell viability of control limbs. Bar indicates a strong statistical trending decrease in cell viability (p = 0.06). Scale bar = 500 μm.