Septic hip in a child

Area of Science:

• Pediatric Orthopedics
• Pediatric Infectious Diseases
• Medical Microbiology

Background:

• Septic arthritis of the hip is an uncommon but serious condition in school-aged children.
• Subtle presenting signs can lead to delayed diagnosis and treatment.
• Prompt intervention is essential to prevent long-term joint damage.

Observation:

• A 10-year-old child presented with hip pain, decreased range of motion, fever, and inability to bear weight.
• Radiographic findings showed femoral head demineralization.
• Laboratory results revealed leukocytosis and an elevated Westergren sedimentation rate.

Findings:

• Joint fluid Gram stain identified gram-positive cocci.
• Blood and joint cultures confirmed Staphylococcus aureus infection.
• The patient developed drug-induced neutropenia during antistaphylococcal penicillin therapy.

Implications:

• This case highlights the importance of considering septic arthritis in children with hip pain, even with subtle signs.
• Aggressive management, including surgical drainage and targeted antibiotic therapy, is critical.
• Awareness of potential complications, such as drug-induced neutropenia, is necessary during treatment.