When viewing this topic in a different language, you may notice some differences in the way the content is structured, but it still reflects the latest evidence-based guidance.

Brachial plexus birth injury

Last reviewed: 9 Apr 2025
Last updated: 19 Mar 2024

Summary

Definition

History and exam

Key diagnostic factors

  • paralysis of an arm
  • observed decreased motion of an arm
  • abnormal posture of the arm
Full details

Other diagnostic factors

  • crepitance of clavicle or humerus
  • Horner syndrome
  • tachypnea, respiratory distress, feeding difficulties, failure to thrive
  • lack of full range of passive movement
  • hyperreflexia, persistent primitive reflexes, abnormal muscle tone, or abnormal body posture
Full details

Risk factors

  • shoulder dystocia
  • large fetal size (>4000 g)
  • maternal diabetes (especially type 1) or gestational diabetes mellitus
  • maternal obesity
  • breech presentation
  • atypical second phase of labor
  • assisted delivery
Full details

Diagnostic tests

1st tests to order

  • clinical diagnosis
  • x-ray of chest and affected upper extremity
Full details

Tests to consider

  • ultrasound scan of the shoulder
  • MRI/MRI myelogram
  • CT/CT myelogram
  • EMG/nerve conduction studies
Full details

Emerging tests

  • three-dimensional proton-density MRI to assess the brachial plexus
  • volumetric MRI and EMG assessment of rotator cuff muscles
  • ultrasound evaluation of the brachial plexus

Treatment algorithm

ACUTE

newborns and infants

ONGOING

following initial treatment

Contributors

Authors

Mark J. Adamczyk, MD

Co-Director

Brachial Plexus Treatment Center

Vice-Chairman

Department of Pediatric Orthopedic Surgery

Akron Children's Hospital

Akron

OH

Disclosures

MJA declares that he has no competing interests.

Stephanie A. Russo, MD, PhD

Co-Director

Brachial Plexus Treatment Center

Pediatric Hand and Peripheral Nerve Surgery

Akron Children’s Hospital

Akron

OH

Disclosures

SAR declares that she has no competing interests.

Peer reviewers

Whitney E. Muhlestein, MD

Peripheral Nerve Fellow

University of Michigan

Ann Arbor

MI

Disclosures

WEM declares that she has no competing interests.

Tim Hems, MA, DM, FRCS(Eng), FRCSEd(Orth)

Consultant Hand and Orthopaedic Surgeon

Queen Elizabeth University Hospital

Glasgow

UK

Disclosures

TH declares that he has written a number of publications over the last few years which highlight the lack of evidence that nerve repair surgery improves outcome in brachial plexus birth palsy.

References

Our in-house evidence and editorial teams collaborate with international expert contributors and peer reviewers to ensure that we provide access to the most clinically relevant information possible.

Key articles

American College of Obstetricians and Gynecologists. Neonatal brachial plexus injury. 2014 [internet publication].Full text

Royal College of Obstetricians and Gynaecologists. Shoulder dystocia: green-top guideline no 42. March 2012 [internet publication].Full text

Smith BW, Daunter AK, Yang LJ, et al. An update on the management of neonatal brachial plexus palsy-replacing old paradigms: a review. JAMA Pediatr. 2018 Jun 1;172(6):585-91. Abstract

Vuillermin C, Bauer AS. Boston Children's Hospital approach to brachial plexus birth palsy. J Pediatr Orthop B. 2016 Jul;25(4):296-304. Abstract

Pondaag W, Malessy MJA. Evidence that nerve surgery improves functional outcome for obstetric brachial plexus injury. J Hand Surg Eur Vol. 2021 Mar;46(3):229-36.Full text  Abstract

Reference articles

A full list of sources referenced in this topic is available to users with access to all of BMJ Best Practice.
  • Brachial plexus birth injury images
  • Differentials

    • Clavicle or humeral fracture
    • Septic arthritis of the shoulder or proximal humeral osteomyelitis
    • Spinal cord or brachial plexus tumor
    More Differentials
  • Guidelines

    • ACOG neonatal brachial plexus palsy: task force report
    More Guidelines
  • padlock-lockedLog in or subscribe to access all of BMJ Best Practice

Use of this content is subject to our disclaimer