How should I order a right lower extremity X-ray of the residual limb (below‑knee amputation) with AP and lateral views?

How to Order an X-ray of a Right Below-Knee Amputation Stump

Order it as "X-ray right tibia, AP and lateral views" or "X-ray right lower leg, AP and lateral views" – the standard terminology for imaging the residual tibia after below-knee amputation.

Ordering Terminology

The residual limb after below-knee amputation contains the tibia (and fibula if present), so you should order imaging using standard anatomical terminology:

• "Right tibia, 2 views (AP and lateral)"
• "Right lower leg, 2 views (AP and lateral)"
• "Right leg radiograph, AP and lateral"

Some institutions may accept "right BKA stump" or "right residual limb," but using standard anatomical terms (tibia/lower leg) ensures clarity and follows established radiographic protocols 1.

Standard Views Required

Obtain a minimum of two orthogonal views:

• Anteroposterior (AP) view – taken with the limb in neutral rotation
• Lateral view – obtained at 90 degrees to the AP projection

These two views are the standard minimum for evaluating any extremity, including residual limbs 1. The lateral view should be obtained with proper positioning to demonstrate the bone in true profile 2.

Technical Considerations

Include the entire residual bone on the images:

• The radiographs must capture from the knee joint down to the end of the residual tibia
• This allows assessment of bone length, cortical thickness, and any complications 3

Positioning accuracy matters:

• Ensure true orthogonal views (exactly 90 degrees apart) for accurate assessment 2, 4
• Poor positioning can obscure pathology or create misleading appearances

Clinical Context to Provide

When ordering, include relevant clinical information:

• Indication: Pain, skin breakdown, infection concern, prosthetic fitting issues, trauma, or routine follow-up
• History: Time since amputation, presence of prosthesis, specific symptoms
• Specific concerns: Suspected fracture, infection, bone overgrowth, heterotopic ossification

This context helps radiologists tailor their evaluation and provide clinically relevant interpretations 5, 3.

Special Situations

For prosthetic fitting evaluation:

• If assessing stump-socket fit, you may request imaging with the prosthesis in place
• Radiopaque markers can be placed at weight-bearing points in the socket to evaluate alignment 5

For osseointegrated implants:

• If the patient has a bone-anchored prosthesis, specify this in the order
• May require additional views or CT for detailed assessment of the bone-implant interface 3

For suspected complications:

• Fracture: Standard AP and lateral views are sufficient initially
• Infection: Plain films are the starting point, though they have limited sensitivity
• Bone overgrowth or heterotopic ossification: Standard views usually adequate

Common Pitfalls to Avoid

• Don't order "knee X-ray" – this typically images the knee joint itself, not the full residual tibia
• Don't assume "stump" is universally understood – use anatomical terms (tibia, lower leg)
• Don't forget to specify laterality – always indicate right or left
• Don't order inadequate views – two orthogonal views minimum; single view is insufficient