The meniscotibial ligament does exist: An anatomic and histological description

Area of Science:

• Orthopedic Surgery
• Human Anatomy
• Histology

Background:

• The meniscotibial ligament (MTL) plays a critical role in knee joint stability.
• Its anatomical and histological features are not widely discussed in existing literature.

Purpose of the Study:

• To describe the rarely discussed anatomical and histological characteristics of the human meniscotibial ligament (MTL).
• To elucidate the MTL's role in meniscus stability and knee joint function.

Main Methods:

• Descriptive laboratory study involving dissection of six fresh-frozen adult cadaver knees.
• Anatomical observation and histopathological analysis of the MTL, meniscus, and tibial plateau.
• Detailed measurement of MTL dimensions and microscopic examination of its tissue composition.

Main Results:

• Macroscopically, the MTL can be divided into medial (MMTL) and lateral (LMTL) components.
• The MMTL is continuous, while the LMTL is discontinuous on the tibial plateau.
• Microscopy revealed the MTL as ligamentous tissue with oriented collagenous fibers and collagen type I-expressing fibroblasts.

Conclusions:

• The MTL attaches to the tibia below the articular cartilage, stabilizing the meniscus and maintaining rotational knee stability.
• Histological analysis confirms the MTL as a ligamentous structure essential for knee biomechanics.
• Understanding MTL anatomy and histology can aid in developing surgical techniques for MTL injuries.