Figure 4 | Scientific Reports

Figure 4

From: Sharing of proximal fibers by the anterolateral and lateral collateral ligaments in the human knee: a cadaveric study

Figure 4

Histological evidence for ligamentous nature of anterolateral ligament (ALL). (a) Hematoxylin and Eosin (H&E) stained section compares distal unshared portions of the knee’s ALL and lateral collateral ligament (LCL). Similar to LCL, the parallelly arranged collagen bundles with fibroblasts dispersed in between, a distinctive feature of a ligament, can be observed. (b) Masson’s trichrome staining of the distal portion of ALL. The parallelly arranged collagen fiber bundles (red) forming tibial and meniscal limbs are observable. The connective tissue (CT) is stained blue. LCL lateral collateral ligament, ALL anterolateral ligament, TL tibial limb, ML meniscal limb, Cl collagen, Bv blood vessel.

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