For a patient who denies foot pain but reports ankle pain, should we obtain ankle radiographs (AP, lateral, mortise) instead of the requested foot X‑ray, and how should we manage their ankle injury?

Addressing the Discrepancy Between Ankle Pain and Foot X-ray Request

When a patient reports ankle pain but a specialist has ordered foot radiographs, you should obtain standard three-view ankle radiographs (AP, lateral, and mortise) instead, because the Ottawa Ankle Rules guide imaging based on the anatomic location of pain and tenderness—not on what another provider may have requested. 1, 2

Apply the Ottawa Ankle Rules to Determine Correct Imaging

The Ottawa Ankle Rules are the validated, evidence-based tool for deciding whether ankle or foot radiographs are indicated, with 92–99% sensitivity for detecting fractures. 1, 2, 3

Order ankle radiographs (three views: AP, lateral, mortise) if the patient has: 1, 2, 3

• Pain in the malleolar zone AND any of the following:
  • Bone tenderness at the posterior edge or tip of either malleolus
  • Inability to bear weight both immediately after injury and for four steps in the emergency department
  • Age ≥55 years (increases fracture risk)

Order foot radiographs only if the patient has: 1, 3

• Pain in the midfoot zone AND any of the following:
  • Bone tenderness at the navicular bone
  • Bone tenderness at the base of the fifth metatarsal
  • Inability to bear weight both immediately and for four steps in the ED

Why This Matters Clinically

• Foot films are unnecessary when trauma is limited to the ankle. A retrospective review of 243 patients who had both ankle and foot radiographs for ankle-only complaints found that all nine fifth metatarsal fractures were visible on properly performed ankle series, and no other foot fractures were present. 4
• Standard ankle radiographs must extend distally to include the base of the fifth metatarsal to avoid missing associated fractures, which eliminates the need for separate foot films in most ankle injuries. 2
• Approximately 26% of lateral ankle sprains harbor occult fibular avulsion fractures not visible on standard views, so if pain persists despite negative initial radiographs, consider specialized views (ATFL view) or advanced imaging (MRI for bone marrow edema). 5

How to Address the Specialist's Request

Communicate directly with the referring specialist to clarify the clinical indication. 1

• Explain that the patient's symptoms localize to the ankle, not the foot
• Share your Ottawa Ankle Rules assessment showing ankle imaging is indicated
• If the specialist suspects a specific foot pathology (e.g., Lisfranc injury, stress fracture), ask for that clinical context to guide appropriate imaging

If the patient meets Ottawa criteria for ankle imaging but not foot imaging, proceed with ankle radiographs. 1, 2 The Ottawa rules have been validated for use by emergency physicians, general practitioners, and physiotherapists to avoid unnecessary radiographs while maintaining diagnostic accuracy. 1

Common Pitfalls to Avoid

• Do not reflexively order both ankle and foot films when clinical findings are isolated to one anatomic region—this leads to unnecessary radiation exposure and cost without improving diagnostic yield. 4
• Do not skip weight-bearing views if the patient can tolerate them, as these provide critical stability information, particularly for malleolar fractures. 2
• Beware of lateral ankle avulsion fractures masquerading as sprains: 40–50% of lateral talar process avulsions are missed on routine radiographs, and swelling inferior to the lateral malleolus is a red flag for this injury pattern. 5