Ankle Arthroscopy

Why this approach — at MOS

Ankle arthroscopy should not be offered as a "diagnostic last resort" for ankle pain without a clear target for treatment. Before recommending arthroscopy, I confirm the intra-articular source of pain with a combination of physical examination, weight-bearing X-rays, MRI, and when appropriate, a diagnostic fluoroscopy-guided intra-articular anesthetic injection. If the injection eliminates the pain, it confirms the joint is the source; if pain persists, other structures need evaluation.

For osteochondral lesions, I use MRI to characterize lesion size, depth (International Cartilage Repair Society grade), and the presence of subchondral cystic change — all of which affect treatment planning. Small, stable lesions below 1.5 cm² are well-treated with microfracture; larger or cystic lesions may require osteochondral allograft.

I perform ankle arthroscopy in combination with the Broström procedure for lateral ankle instability patients with concurrent intra-articular pathology — this addresses both problems through one anesthetic event. Patients in Montgomery County are spared the scheduling of a second procedure and second recovery.

Who is a candidate?

Indications

• Anterior ankle impingement (osseous or soft-tissue) causing pain with dorsiflexion, confirmed on X-ray or MRI
• Osteochondral lesion of the talus (OLT) — cartilage and/or bone defect not responding to conservative treatment, typically requiring bone marrow stimulation (microfracture) or cartilage repair
• Ankle synovitis or inflammatory arthritis flare not controlled non-operatively
• Loose bodies causing mechanical catching or locking of the joint
• Chronic ankle pain with intra-articular source confirmed on imaging but inadequately characterized
• Concurrent ligament or tendon procedures (Broström repair, peroneal tendon repair) where intra-articular pathology is also present — arthroscopy is performed first in the same anesthetic

Contraindications

• Advanced tibiotalar osteoarthritis — arthroscopy may provide limited relief; ankle replacement or fusion may be more appropriate
• Active ankle joint infection — arthroscopic irrigation may be performed for septic arthritis but differs from elective arthroscopy
• Significant peripheral edema or skin condition preventing safe portal placement

Conservative Treatment First

Most ankle conditions amenable to arthroscopy are first treated without surgery. Anti-inflammatory medications, a trial of physical therapy, activity modification, and corticosteroid injection into the ankle joint are standard initial steps for impingement and synovitis. Osteochondral lesions smaller than 1.5 cm are initially observed with activity restriction; those causing persistent symptoms or detected after failure of non-operative care are considered for arthroscopy.

Anterior ankle impingement from bone spurs is not likely to resolve without removal of the spurs — but symptoms can often be managed with rest, anti-inflammatory medications, and avoiding extreme dorsiflexion activities long-term. Surgery is offered when symptoms significantly limit activity after a reasonable conservative trial.

The procedure

What Is Ankle Arthroscopy?

Ankle arthroscopy is a minimally invasive procedure in which a small camera and instruments are inserted into the ankle joint through two or three small incisions. It is used to diagnose and treat problems inside the joint — including bone spurs, cartilage damage, scar tissue, loose bodies, and synovitis — without opening the ankle fully.

The ankle joint is a complex hinge joint formed by the tibia above, fibula laterally, and talus below. Between these bones lies articular cartilage that allows smooth, pain-free motion. When cartilage is damaged, bone spurs form, or the synovial lining becomes inflamed and scarred, pain and stiffness result. Many of these problems are amenable to arthroscopic treatment — visualization and surgical correction through portals the size of a pen.

Ankle arthroscopy is both a diagnostic and therapeutic tool. MRI identifies most significant intra-articular pathology before surgery, but arthroscopy provides direct visualization under magnification and allows immediate treatment. Common conditions treated arthroscopically include anterior ankle impingement (bone spurs on the front of the tibia and talus that cause pain with dorsiflexion), osteochondral lesions of the talus (cartilage and bone defects), synovitis (inflamed joint lining), and loose bodies (fragments of bone or cartilage floating in the joint).

What Happens During Ankle Arthroscopy?

Surgery is performed at an ambulatory surgery center as an outpatient procedure. Most patients go home within 2 hours of surgery.

Anesthesia: A popliteal sciatic nerve block provides anesthesia and post-operative analgesia. Light sedation or general anesthesia is added based on patient and anesthesiologist preference.

Positioning: The patient lies supine with the ankle hanging over the end of the table. A noninvasive ankle distractor may be applied to open the joint space and improve visualization. A tourniquet on the calf controls bleeding.

Portal Placement: The anteromedial and anterolateral portals are the primary working portals, placed on either side of the anterior ankle through stab incisions approximately 5 mm in length. The saphenous vein and branches of the superficial and deep peroneal nerves are adjacent to these portals and are identified and protected.

Diagnostic Survey: The arthroscope (2.7 mm or 4.0 mm diameter) is inserted. A systematic survey of the joint is performed: medial gutter, medial talar dome, central talar dome, lateral talar dome, lateral gutter, posterior recess (via posterior portals if needed). The tibial plafond, talar dome, and both gutters are inspected for cartilage integrity, synovitis, and loose bodies.

Treatment — Impingement Debridement: Anterior tibial and talar osteophytes are resected with a small arthroscopic burr and shaver. Soft-tissue impingement (scar tissue) is debrided with a motorized shaver.

Treatment — Osteochondral Lesions: Small lesions (< 1.5 cm²) are treated with microfracture — small holes are made in the exposed bone with a pick, stimulating bone marrow stem cells to form fibrocartilage over the defect. Larger lesions may require osteochondral autograft transfer (OATs) or allograft, which are more complex procedures.

Treatment — Synovectomy / Loose Bodies: Inflamed synovium is removed with the motorized shaver. Loose bodies are identified and extracted with graspers.

Closure: Portal incisions are closed with a single suture or Steri-Strips. A compressive dressing and posterior splint are applied.

Recovery timeline

Frequently Asked Questions