Persistent Knee Swelling After Meniscus Surgery: Next Steps at 8 Weeks

When Swelling Persists Beyond Expected Timeline

Mild swelling can last 3–6 months post‑meniscectomy/repair. However, significant swelling at 8 weeks despite PT warrants re‑evaluation.

Potential Causes

• Inadequate rehabilitation progression
• Residual meniscal fragment or re‑tear
• Chondral damage / early osteoarthritis
• Synovitis or cyclops lesion (post‑ACL)
• Infection (low‑grade, indolent)
• Complex regional pain syndrome (CRPS)

Recommended Actions

1. Discuss with surgeon – may order MRI or ultrasound.
2. Modify PT: emphasize quad activation, neuromuscular control, load management.
3. Consider aspiration if effusion large (diagnostic + therapeutic).
4. Anti‑inflammatory regimen (oral/topical) if not contraindicated.
5. Activity modification – avoid provocative loads.

Persistent effusion is a sign, not a diagnosis. Targeted workup guides effective intervention.