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Workup

Imaging Studies

For the distal and diaphyseal humerus fractures, anteroposterior and lateral views of the humerus, as well as transthoracic and axillary views of the shoulder, should be adequate to visualize a fracture. CT scans are helpful if radiographs are unclear.

Proximal humerus fracture

The humeral head articulates with the scapular glenoid. The proximal humerus has 4 parts: articulating surface (anatomical neck), greater tuberosity, lesser tuberosity, and humeral shaft. The surgical neck is just distal to both tuberosities.

The minimum baseline studies for the evaluation of proximal humeral fractures must include a true anteroposterior (AP) view of the scapula and glenohumeral joint, an axillary view, and a lateral Y view of the scapula, evaluating the glenohumeral joint and proximal humerus in 3 perpendicular planes.^[6]

All greater tuberosity fractures should, at some point, have an ultrasound examination or an MRI to check the integrity of the rotator cuff.

Blood is supplied to the humeral head from branches off the axillary artery. Blood travels distally to proximally. Fractures of the anatomical neck may affect blood supply and result in avascular necrosis of the humeral head.

Classification

The Neer classification system is the commonly used terminology to describe proximal humerus fractures.^[4] (See the image below.)

Neer classification.

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If any of the 4 segments is separated by more than 1 cm from its neighbor or is angulated more than 45°, the fracture is said to be displaced.

One-part fractures are nondisplaced fractures or fractures with minimal displacement.
Two-part fractures are fractures in which only a single segment is displaced in relation to the other three.
Three-part fractures occur when two segments are displaced in relation to the other two parts. ^[25]
Four-part fractures exist when all the humeral segments are displaced.

Treatment & Management

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Cheung EV, Sperling JW. Management of proximal humeral nonunions and malunions. Orthop Clin North Am. 2008 Oct. 39(4):475-82, vii. [Medline].
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Warner JP, Costouros JG, Gerber C. Fractures of the proximal humerus. Bucholz RW, Heckman JD, Brown CC, eds. Rockwood and Green's Fractures in Adults. 6th ed. Philadelphia, Pa: Lippincott Williams and Wilkins; 2006. Vol 1: 1161-1205.
Beks RB, Ochen Y, Frima H, Smeeing DPJ, van der Meijden O, Timmers TK, et al. Operative versus nonoperative treatment of proximal humeral fractures: a systematic review, meta-analysis, and comparison of observational studies and randomized controlled trials. J Shoulder Elbow Surg. 2018 Aug. 27 (8):1526-1534. [Medline].
Launonen AP, Sumrein BO, Reito A, Lepola V, Paloneva J, Jonsson KB, et al. Operative versus non-operative treatment for 2-part proximal humerus fracture: A multicenter randomized controlled trial. PLoS Med. 2019 Jul. 16 (7):e1002855. [Medline]. [Full Text].
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Brukner P. Stress fractures of the upper limb. Sports Med. 1998 Dec. 26(6):415-24. [Medline].
Ogawa K, Yoshida A. Throwing fracture of the humeral shaft. An analysis of 90 patients. Am J Sports Med. 1998 Mar-Apr. 26(2):242-6. [Medline].
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Media Gallery

Diaphyseal humerus fracture.
Neer classification.

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Author

Adarsh K Srivastava, MD Staff Physician, Department of Emergency Medicine/Internal Medicine, Allegheny General Hospital

Adarsh K Srivastava, MD is a member of the following medical societies: American College of Emergency Physicians, Society for Academic Emergency Medicine, Emergency Medicine Residents' Association

Disclosure: Nothing to disclose.

Coauthor(s)

Andrew A Aronson, MD, FACEP Vice President, Physician Practices, Bravo Health Advanced Care Center; Consulting Staff, Department of Emergency Medicine, Taylor Hospital

Andrew A Aronson, MD, FACEP is a member of the following medical societies: American College of Emergency Physicians, Massachusetts Medical Society, Society of Hospital Medicine

Disclosure: Nothing to disclose.

Specialty Editor Board

Francisco Talavera, PharmD, PhD Adjunct Assistant Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Received salary from Medscape for employment. for: Medscape.

Eric L Legome, MD Professor and Chair, Department of Emergency Medicine, Mount Sinai St Lukes and Mount Sinai West; Vice Chair of Academic Affairs, Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai

Eric L Legome, MD is a member of the following medical societies: American College of Emergency Physicians, Eastern Association for the Surgery of Trauma, New York American College of Emergency Physicians, Society for Academic Emergency Medicine

Disclosure: Nothing to disclose.

Chief Editor

Trevor John Mills, MD, MPH Chief of Emergency Medicine, Veterans Affairs Northern California Health Care System; Professor of Emergency Medicine, Department of Emergency Medicine, University of California, Davis, School of Medicine

Trevor John Mills, MD, MPH is a member of the following medical societies: American Academy of Emergency Medicine, American College of Emergency Physicians

Disclosure: Nothing to disclose.

Acknowledgements

Michelle Ervin, MD Chair, Department of Emergency Medicine, Howard University Hospital

Michelle Ervin, MD is a member of the following medical societies: American Academy of Emergency Medicine, American College of Emergency Physicians, American Medical Association, National Medical Association, and Society for Academic Emergency Medicine

Disclosure: Nothing to disclose.

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