Ankle & Foot Diagnostic Imaging Arthritis & Trauma II| El Paso, TX.

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Lisfranc Fracture-Dislocation

  • M/C dislocation of the foot at tarsal-metatarsal articulation (Lisfranc joint). Direct impact or landing and plantar or dorsal flexing the foot. Lisfranc ligament holding 2nd MT base and 1st Cu is torn. Manifests with or w/o fracture-avulsion.
  • Imaging: 1st step: foot radiography in most cases sufficient to Dx. MSK US may help: show disrupted Cu1-Cu2. Ligament and widened space > 2.5mm. MRI may help but not essential. Weight-bearing view aids Dx.
  • 2-types: homolateral (1st MTP joint in contact) and divergent (2-5 MT displaced laterally and 1st MT medially)
  • Management: operative fixation is crucial
  • N.B. Atraumatic Lisfranc dislocation is a frequent complication of a diabetic Charcot foot

Osteochondral Injury of the Talus (OCD)

  • Common. Non-traumatic found in superior-medial talar dome. Traumatic may affect supero-lateral dome.
  • Clinically: pain/effusion/locking. Imaging is crucial.
  • 1st step: radiography may reveal focal radiolucent concavity/halo, fragment.
  • MRI helpful esp. if OCD is cartilaginous and to demonstrate bone edema.
  • Management: non-operative: short-leg cast/immonbilization-4-6 wk. operative: arthrocsopic removal.
  • Complications: premature 2nd DJD

Metatarsal Injuries

  • Acute & Stress fractures are common: m/c 5th MT & 2nd, 3rd MT.
  • Jones Fx: extra-articular Fx of proximal metaphysis of the 5th MT. Prone to non-union. Often fixed operatively.
  • Pseudo-Jones: intra-articular avulsion of 5th MT styloid/base by eccentric contraction of Peroneus Brevis M. Managed conservatively: boot-cast immobilization. Both Jones & Pseudo-Jones Dx by foot series radiography.
  • Stress Fx. Calcaneus, 2nd, 3rd, 5th MTs. Repeated loading (running) or “March foot” 2nd/3rd MT. Clinically: pain on activity, reduced by rest. Dx: x-rays often unrewarding earlier. MRI or MSK US may help. Managed: Conservatively. Complications; progress into complete Fx
  • Turf toe: common athletic hyperextension of 1st MTP-sesamoid/plantar plate complex is tearing. 1st MTP unstable/loose. Managed operatively.

Arthritis of the Foot & Ankle

  • DJD of the ankle: uncommon a primary OA. Typically develops as 2nd to trauma/AVN, RA, CPPD, Hemophilic arthropathy, Juvenile Idiopathic Arthritis, etc. manifests as DJD: osteophytes, JSL, subchondral cysts all seen on x-rays
  • Inflammatory Arthritis: RA may develop in the ankle or any synovial joint. Will typically presents with symmetrical Hands/feet RA initially (2nd, 3rd MCP, wrists, MTPs in feet) usually with erosion, uniform JSL, juxta-articular osteopenia, and delayed subluxations.
  • HLA-B27 spondyloarthropathies: commonly affect lower extremity: heel, ankle esp in Reactive (Reiter). Erosive-productive bone proliferation is a crucial Dx.
  • Gouty Arthritis: common in the lower extremity. Ankle, mid-foot foot esp 1st MTPs. Initial onset: acute gouty arthritis with ST effusion and no erosions/tophi. Chronic tophaceous gout: peri-articular, intra-osseous punched-out erosions with over-hanging edges, no initial JSL/osteopenia, ST. Tophi may be seen.
  • Miscellaneous arthropathy: PVNS. Not common. Affects 3-4th decades of life. The result of synovial proliferation with Macrophages and multi-nucleated Giant Cells filled with hemosiderin and fatty accumulation may lead to inflammation, cartilage damage, extrinsic bone erosions. Dx: x-rays are insensity, MRI modality of choice. Synovial biopsy. Management: operative, can be difficult.

Neuropathic Osteoarthropathy

  • (Charcot’s joint) Common and on the rise d/t epidemic in type 2 DM. May present with pain initially (50% of cases) and painless destructive arthropathy as a late manifestation. Early Dx: delayed. Imaging is crucial: x-rays: initially unrewarding, some SF effusion is seen. MRI helps with early Dx and extremity off-loading. Late Dx: irreversible dislocations, collapse, disability. Note: Lisfrance dislocation in Charcot joint
  • M/C mid-foot (TM joint) in 40% of cases, ankle 15%. Progression: Rocker-bottom foot, ulcerations, infections, increased morbidity, and mortality.
  • Early Dx: by MRI is crucial. Suspect it in patients with type 2 DM especially if early non-traumatic foot/ankle pain reported.

Ankle & Foot Imaging

 

Dr. Alex Jimenez D.C.,C.C.S.T

Welcome-Bienvenido's to our blog. We focus on treating severe spinal disabilities and injuries. We also treat Sciatica, Neck and Back Pain, Whiplash, Headaches, Knee Injuries, Sport Injuries, Dizziness, Poor Sleep, Arthritis. We use advanced proven therapies focused on optimal mobility, health, fitness, and structural conditioning. We use Individualized Diet Plans, Specialized Chiropractic Techniques, Mobility-Agility Training, Adapted Cross-Fit Protocols and the "PUSH System" to treat patients suffering from various injuries and health problems. If you would like to learn more about a Doctor of Chiropractic who uses advanced progressive techniques to facilitate complete physical health, please connect with me. We a focus on simplicity to help restore mobility and recovery. I'd love to see you. Connect!

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