Fig. 2From: Transtibial versus independent femoral tunnel drilling techniques for anterior cruciate ligament reconstruction: evaluation of femoral aperture positioningSchematic diagram of profile view of medial wall of lateral femoral condyle. LICR; lateral intercondylar ridge. Blue lines: Anatomical coordinates; PD (proximal-distal) and AP (antero-posterior) axes. Red lines: Blumensaat's line coordinates; BL (Blumensaat's line) or DS axis (deep-to-shallow axis) and perpendicular to BL or HL (high-to-low axis)Back to article page