Lyme Disease Mistaken for Child Abuse in a 4-Year-Old Boy
A 4-year-old boy with Lyme disease was placed in protective custody.
An erythema migrans rash was initially mistaken for bruising.
Recognition of Lyme disease led to rapid recovery and reunification.
Some medical cases stay with us long after we read them. One such case—published by Pan and colleagues in 2021—still stands out for how quickly Lyme disease mistaken for child abuse escalated into a family crisis. [1]
The case involved a 4-year-old boy brought to the hospital with a swollen knee, a fractured arm, and a dark mark on his buttock that resembled a bruise.
No adult had witnessed the injury, and there was no clear explanation for the findings. Following standard procedure, clinicians reported suspected abuse, and the child was placed in protective custody.
The initial findings raised concern for nonaccidental trauma. But the final diagnosis was far more complex.
The Subtle Clue That Changed Everything
As the medical team evaluated the child, one clinician noticed something unusual about the presumed bruise.
The lesion did not behave like a typical traumatic bruise:
- The borders formed a faint ring
- The center appeared lighter
- The lesion expanded outward over time rather than fading
These findings were more consistent with erythema migrans, the hallmark rash associated with Lyme disease.
Serologic testing for Lyme disease was positive. [1]
The child was treated with amoxicillin, and the response was rapid. The knee swelling improved, the rash resolved, and the child reportedly reunited with his family within five days.
Why Lyme Disease in Young Children Can Be Misinterpreted
Young children rarely provide a clear medical history. They may not be able to explain:
- When symptoms began
- Whether a tick bite occurred
- Whether a rash is expanding
- How pain or weakness developed
Symptoms may instead appear nonspecific, including:
- Irritability
- Refusal to walk
- Fatigue
- Reduced limb use
Lyme disease may also involve rashes in areas caregivers do not immediately inspect, including the buttocks, groin, or diaper region.
In children, erythema migrans in these locations may be mistaken for bruising or trauma.
Cases involving limping, swollen joints, unusual rashes, or behavioral changes in children may overlap with broader patterns seen in pediatric Lyme disease misdiagnosis and delayed Lyme disease diagnosis.
Balancing Child Protection and Medical Evaluation
Any suspicion of child abuse must be taken seriously and evaluated immediately.
At the same time, this case highlights the importance of maintaining a broad medical differential diagnosis when findings do not completely fit expected injury patterns.
The distinction between medical illness and suspected maltreatment may sometimes depend on subtle clinical findings.
What This Case Teaches Us
This child’s case illustrates how Lyme disease mistaken for child abuse may rapidly escalate into legal intervention, emotional distress, and temporary family separation.
It also demonstrates how recognition of erythema migrans and Lyme disease can quickly change the clinical picture.
Awareness of Lyme disease protects children. Careful evaluation may help avoid missed diagnoses and unnecessary family disruption.
For more on Lyme rashes and atypical presentations, see Lyme disease rashes are not always a bull’s-eye and Lyme disease symptoms guide.
Frequently Asked Questions
Can Lyme disease mimic bruising in children?
Yes. Erythema migrans rashes may sometimes resemble bruises, particularly when located in hidden areas such as the buttocks or groin.
Why are young children difficult to diagnose?
Young children may not be able to describe pain, tick exposure, or evolving symptoms, making diagnosis more challenging.
Can Lyme disease cause limping or refusal to walk?
Yes. Lyme disease in children may lead to joint swelling, pain, limping, or reduced limb use.
Resources:
A Multispecialty Approach to the Identification and Diagnosis of Nonaccidental Trauma in Children
Recognizing medical child abuse in children presenting with chronic pain
Lyme disease symptoms in toddler attributed to child abuse
Study finds misdiagnosis and delayed diagnosis common for Lyme disease patients
References:
- Pan T, Nasreddine A, Trivellas M, Hennrikus WL. Lyme Disease Misinterpreted as Child Abuse. Case Rep Orthop. 2021;2021:6665935.
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
I can’t even begin to imagine what this family went through. It’s brave of the authors to publish this. One also wonders how the clinicians felt, doing what they were obligated to do legally and ethically, only to discover later a rather “obscure” reason was what was responsible for all this. If this poor kid relapses at some point in the future, the family will probably be much, much more hesitant to present, making everything all that much worse. Brutal.
You’re right — it’s almost impossible to imagine what this family went through. Everyone was doing what they thought was right, yet the real cause was something easily missed. What breaks my heart is that experiences like this can make families afraid to seek help again if symptoms return. No one should ever have to face that twice.