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Dorsal cuneocuboid ligament

The dorsal cuneocuboid ligament is a small but important dorsal stabilizing ligament of the midfoot. It connects the lateral cuneiform to the cuboid bone, forming part of the dorsal tarsal ligament complex. This ligament contributes to the stability of the cuneocuboid joint, which lies within the midfoot articulation between the lateral cuneiform and the cuboid.

It helps maintain the transverse arch of the foot and works in coordination with the interosseous and plantar cuneocuboid ligaments. Despite being a relatively thin structure, it plays a significant biomechanical role by resisting dorsal displacement and rotational forces across the lateral midfoot.

Injury to this ligament is uncommon but may occur in midfoot sprains, Lisfranc-type injuries, or inversion/eversion stress trauma. MRI and CT can help identify subtle ligamentous injuries that contribute to midfoot instability or pain.

Synonyms

  • Dorsal ligament of the cuneocuboid joint

  • Dorsal tarsal ligament (lateral component)

Attachments (Origin and Insertion)

  • Proximal attachment: Dorsal surface of the lateral cuneiform

  • Distal attachment: Dorsal surface of the cuboid bone

  • The ligament fibers run transversely and slightly obliquely across the dorsal aspect of the joint capsule

Course

  • The ligament passes horizontally over the dorsal aspect of the cuneocuboid joint, blending with the joint capsule.

  • It lies superficial to the interosseous cuneocuboid ligament and is continuous with fibers from the dorsal intercuneiform ligament medially.

  • The dorsal surface of the ligament is covered by extensor digitorum brevis and the dorsalis pedis artery.

Relations

  • Superiorly: Extensor digitorum brevis muscle and dorsalis pedis artery

  • Inferiorly: Interosseous and plantar cuneocuboid ligaments

  • Medially: Dorsal ligaments of the cuboideonavicular and intercuneiform joints

  • Laterally: Dorsal calcaneocuboid ligament and dorsal cubometatarsal ligaments

Arterial Supply

  • Dorsalis pedis artery (via dorsal tarsal branches)

  • Perforating branch of the fibular artery (occasional contribution)

Function

  • Joint stabilization: Strengthens and stabilizes the dorsal aspect of the cuneocuboid joint

  • Arch support: Contributes to the integrity of the transverse arch of the foot

  • Force resistance: Prevents dorsal and rotational displacement of the cuboid during gait

  • Load distribution: Works with plantar and interosseous ligaments to balance stress across the midfoot

  • Motion limitation: Restrains excessive dorsiflexion or abduction at the midtarsal region

Clinical Significance

  • Injury mechanism: Commonly injured in midfoot sprains or lateral column instability

  • Association: May accompany injuries of the Lisfranc complex, intercuneiform ligaments, or calcaneocuboid capsule

  • Symptoms: Dorsal midfoot pain, tenderness over cuneocuboid joint, and swelling after trauma

  • Chronic cases: May cause midfoot instability or contribute to flatfoot deformity

  • Imaging importance: MRI is key for assessing ligament integrity; CT helps evaluate bony avulsions and alignment abnormalities

MRI Appearance

  • T1-weighted images:

    • Normal ligament: low signal intensity (dark linear band) connecting lateral cuneiform to cuboid

    • Adjacent fat and bone marrow: intermediate to bright signal

    • Partial tear: irregular contour or focal discontinuity with mild hyperintensity

    • Complete tear: disruption or non-visualization of ligament fibers

  • T2-weighted images:

    • Normal ligament: low signal intensity, darker than on T1

    • Partial tear: linear hyperintense signal within ligament fibers

    • Complete tear: high-signal defect with associated fluid or edema

    • Adjacent bone marrow edema or joint effusion may appear hyperintense

  • STIR:

    • Normal: dark band with smooth margins

    • Pathology: bright hyperintense signal in and around the ligament indicating edema or sprain

    • Adjacent soft tissue swelling easily visualized

  • Proton Density Fat-Saturated (PD FS):

    • Normal: uniformly dark ligament

    • Partial tear or sprain: focal bright signal with mild periligamentous edema

    • Complete rupture: nonvisualization with diffuse hyperintense edema

  • T1 Fat-Sat Post-Contrast:

    • Normal: minimal or no enhancement

    • Injured ligament: enhancing irregular margins or enhancement along torn fibers

    • Chronic scarring or granulation tissue may enhance heterogeneously

CT Appearance

Non-Contrast CT:

  • Ligament not distinctly visualized; appears as a fine soft-tissue density bridging the lateral cuneiform and cuboid

  • Bony attachments may show subtle irregularity or small avulsion fragments in trauma

  • Indirect signs: midfoot widening, dorsal step-off, or small cortical avulsion

Post-Contrast CT (standard):

  • Minimal enhancement of surrounding soft tissue if inflamed

  • May show periligamentous edema or thickening in subacute injury

  • Useful for detecting associated fractures, dislocations, or osteophyte formation in chronic midfoot instability

MRI image

dorsal cuneocuboid ligament axial cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000

MRI image

dorsal cuneocuboid ligament coronal cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000

MRI image

dorsal cuneocuboid ligament axial cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000_00001