Preventing Unnecessary Surgery for Children With Lyme Arthritis
Lyme arthritis in children is frequently mistaken for septic arthritis—leading to unnecessary surgery that could be avoided with early recognition and testing.
This diagnostic challenge is especially important in emergency settings, where children present with an acutely swollen, painful joint and rapid decisions must be made.
Lyme arthritis is a common late manifestation discussed in the Lyme disease symptoms guide and may occur without a known tick bite or rash.
Lyme Arthritis Can Mimic Septic Arthritis
Both Lyme arthritis and bacterial septic arthritis can present with:
- Joint swelling
- Pain and limited movement
- Inflammatory joint fluid findings
A study found that 7 out of 10 children with Lyme disease were initially suspected of having septic arthritis and underwent surgery.
This overlap creates a high risk of misdiagnosis.
Can We Prevent Unnecessary Surgery?
A case series reviewed children presenting with swollen elbows due to Lyme disease.
Three out of four children were correctly diagnosed and treated with antibiotics alone.
None had a known tick bite or rash—but all had positive Lyme serology.
Clinical suspicion—not just classic signs—led to correct diagnosis.
A Missed Diagnosis Leading to Surgery
One child underwent surgical irrigation and debridement due to concern for septic arthritis.
Lyme testing was not available at the time of presentation.
Five days later, Lyme serology returned positive, and the child was successfully treated with antibiotics.
This surgery may have been avoidable with earlier testing.
Why Early Testing Matters
Lyme serology can sometimes be negative early, but testing still plays a critical role in guiding decision-making.
The authors recommend emergent Lyme testing in children with unexplained joint swelling to reduce unnecessary procedures.
Clinical Takeaway
In children presenting with acute joint swelling—especially in endemic areas—Lyme disease should be considered early, even without a rash or tick bite. Prompt testing and clinical suspicion can prevent unnecessary surgery and allow effective treatment with antibiotics.
Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.
Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention
