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Cuboideonavicular joint

The cuboideonavicular joint is a small, planar synovial articulation between the cuboid and navicular bones on the lateral aspect of the midfoot. It serves as part of the transverse tarsal complex, contributing to the flexibility and adaptability of the medial and lateral longitudinal arches.

Although its movement is limited, this joint allows slight gliding motion that helps accommodate uneven surfaces during gait. The joint is reinforced by strong dorsal, plantar, and interosseous ligaments, ensuring stability while allowing minimal mobility for shock absorption.

Pathology of the cuboideonavicular joint is uncommon but may occur due to trauma, arthritis, or inflammatory conditions, often presenting with lateral midfoot pain. Recognition of its anatomy and imaging appearance is essential in evaluating midtarsal joint disorders.

Synonyms

  • Cuboid–navicular articulation

  • Midtarsal lateral joint

  • Lateral transverse tarsal joint

Type

  • Plane synovial joint

Articulating Surfaces

  • Anterior surface of the navicular bone articulates with the posterior surface of the cuboid bone.

  • Both surfaces are flat or slightly concave, covered by articular cartilage.

Capsule and Ligaments

  • Joint capsule: Fibrous and thin, enclosing the articulation.

  • Dorsal cuboideonavicular ligament: Connects the dorsal aspects of the cuboid and navicular bones.

  • Plantar cuboideonavicular ligament: Lies on the plantar surface, blending with the long plantar ligament.

  • Interosseous ligament: Strongest stabilizer, located in the gap between the cuboid and navicular bones.

Relations

  • Superiorly: Dorsal tendons of the extensor digitorum longus and peroneus tertius muscles

  • Inferiorly: Plantar fascia and long plantar ligament

  • Medially: Naviculocuneiform joint and talonavicular joint

  • Laterally: Calcaneocuboid joint

  • Posteriorly: Body of the cuboid bone

  • Anteriorly: Lateral aspect of the navicular bone

Nerve Supply

  • Lateral plantar nerve (from tibial nerve)

  • Deep fibular (peroneal) nerve contributes articular branches

Function

  • Stability: Helps maintain the lateral longitudinal arch of the foot

  • Mobility: Allows minimal gliding to adapt to uneven surfaces

  • Load transfer: Transmits forces from hindfoot (calcaneus/cuboid) to midfoot and forefoot

  • Shock absorption: Works with adjacent tarsal joints to distribute impact forces

  • Integration: Part of the midtarsal complex (along with calcaneocuboid and talonavicular joints)

Clinical Significance

  • Arthritis: Degenerative or inflammatory arthropathy can cause chronic lateral midfoot pain

  • Trauma: Subluxation or dislocation may occur with high-impact injuries

  • Coalition: Fibrous or osseous union with adjacent bones limits mobility and causes stiffness

  • Overuse syndromes: Repetitive strain from running or jumping may produce ligamentous irritation

  • Surgical importance: Must be preserved in lateral column lengthening and midfoot reconstructive procedures

MRI Appearance

  • T1-weighted images:

    • Articular cartilage: low signal intensity (dark)

    • Subchondral bone: intermediate to high signal due to marrow fat

    • Joint space: narrow, smooth, and uniform

    • Effusion or synovitis: appears as low-to-intermediate fluid signal

    • Bone marrow edema or stress reaction: focal low signal areas in subchondral bone

  • T2-weighted images:

    • Normal cartilage: intermediate-to-low signal

    • Joint fluid: bright hyperintense signal

    • Pathology (synovitis, effusion): fluid appears bright

    • Degenerative changes: irregular bright signal in subchondral bone or cartilage thinning

    • Stress fractures: hyperintense line within adjacent bones surrounded by bone marrow edema

  • STIR:

    • Normal joint margins remain dark

    • Bone marrow edema or inflammation becomes hyperintense

    • Enhances detection of occult fractures or inflammatory arthropathy

  • Proton Density Fat-Saturated (PD FS):

    • Articular cartilage: dark, smooth line

    • Joint effusion: bright hyperintense signal

    • Subchondral marrow edema or cysts: bright signal focus

    • Excellent for detecting subtle bone contusions and capsular thickening

  • T1 Fat-Sat Post-Contrast:

    • Normal joint: minimal enhancement

    • Synovitis or inflammatory arthropathy: marked enhancement of synovial lining

    • Osteoarthritis: focal enhancement at cartilage defects or osteophyte margins

CT Appearance

Non-Contrast CT:

  • Clearly delineates articular surfaces of cuboid and navicular bones

  • Joint space: thin, well-defined hypodense line

  • Degenerative changes: subchondral sclerosis, cysts, or osteophytes

  • Fracture or coalition: visible cortical irregularity or bony bridging

  • Helpful in assessing alignment, joint congruity, and bone morphology

Post-Contrast CT (standard):

  • Normal joint: mild uniform enhancement of surrounding soft tissues

  • Synovial inflammation: enhancing soft tissue thickening

  • Degenerative joint disease: irregular cortical margins and narrowing of joint space

MRI images

Cuboideonavicular joint coronal cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000

MRI images

Cuboideonavicular joint axial cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000

CT image

Cuboideonavicular joint ct axial

CT VRT 3D image

Cuboideonavicular joint 3d image