Blood CGRP Levels May Help Identify Bacterial Musculoskeletal Infections in Children | Research

The takeaway

Elevated serum CGRP levels showed potential as a biomarker for identifying bacterial musculoskeletal infections in pediatric patients, complementing existing inflammatory markers.

CGRP diagnoses infections
The migraine neuropeptide CGRP may also help diagnose bacterial bone/joint infections in children — a new role for an established molecule

What the researchers found

Elevated serum CGRP levels associated with bacterial musculoskeletal infections in pediatric patients, showing potential as a complementary diagnostic biomarker alongside traditional inflammatory markers.

Why it matters

Rapid diagnosis of pediatric bone/joint infections prevents joint destruction and disability. A new biomarker could speed diagnosis.

How the study worked

Assessment of serum CGRP levels in children with musculoskeletal infections vs controls, with evaluation of diagnostic performance.

What this study cannot tell us

Pediatric study. Specific diagnostic accuracy metrics in full paper. CGRP measurement not yet routine in clinical labs.

How to read the evidence

Diagnostic biomarker study. Novel application of CGRP measurement.

When this study was published

Published in 2025.

The bigger picture

CGRP is becoming recognized as more than a migraine molecule — it's a systemic inflammatory biomarker with diagnostic applications across medicine.

Questions still open

Should CGRP be added to septic arthritis diagnostic panels?
Does CGRP level correlate with infection severity?
Would anti-CGRP migraine drugs affect diagnostic CGRP levels?

Common questions

Can a blood test for CGRP diagnose bone infections in children?

This study found elevated CGRP levels in children with bacterial bone and joint infections, suggesting it could be a useful additional diagnostic marker alongside existing tests.

What is CGRP's role in infection?

CGRP is released during inflammation and pain. Elevated blood levels may indicate significant bacterial infection in the musculoskeletal system, helping doctors make faster diagnoses.

Read the original research

Calcitonin Gene-Related Peptide for Identifying Pediatric Bacterial Musculoskeletal Infections: A Prospective, Multicenter Study.

Pediatric emergency care, 42(3), 175-179

View on PubMed ↗Publisher’s paper ↗

Citation

Kahane, Caroline G; Nigrovic, Lise E; Yang, Daping; Majzoub, Joseph A; Kellogg, Mark D; Kaplan, Ron L; Cruz, Andrea T; Chiu, Isaac M; Lyons, Todd W. (2026). Calcitonin Gene-Related Peptide for Identifying Pediatric Bacterial Musculoskeletal Infections: A Prospective, Multicenter Study.. Pediatric emergency care, 42(3), 175-179. https://doi.org/10.1097/PEC.0000000000003520