Metacarpal Fracture

Metacarpal fractures are among the most common fractures of the upper extremity, constituting approximately 1 in 5 fractures presenting to the emergency department. [1] They account for 30–50% of all hand fractures, predominantly affect young males (peak incidence ages 10–29), and the majority can be managed nonoperatively. [2-4]

• Mechanism of injury: Punching (most common for 4th/5th MC — "boxer's fracture"), direct blow, fall on outstretched hand, crush injury, sports contact [3][5-6]
• Hand dominance and occupation (manual labor vs. desk work)
• Which digit/area was struck and in what position
• Timing: When did the injury occur? Any prior treatment attempts?
• Symptom characterization: Pain, swelling, deformity, inability to make a fist, finger crossing/scissoring with flexion
• Important negatives: Skin break (open fracture vs. "fight bite"), numbness/tingling, prior hand injuries, tetanus status
• Ask specifically about punching a person's mouth — high risk for fight bite/joint sepsis [1]

• Open fracture (any wound near the fracture, especially over MCP joint — fight bite)
• Rotational deformity — the single most important indication for surgical fixation; even 5° of malrotation causes significant finger overlap [7-8]
• Neurovascular compromise — diminished capillary refill, sensory loss
• Multiple metacarpal fractures — higher energy mechanism, consider associated injuries
• Compartment syndrome of the hand (tense swelling, pain with passive stretch)
• Intra-articular fractures with significant displacement (Bennett/Rolando fractures of the thumb)
• Extensor tendon injury — inability to extend at MCP joint

• Acute analgesia: NSAIDs (ibuprofen 400–600 mg q6h, naproxen 500 mg q12h) are first-line; acetaminophen as adjunct
• Nerve blocks: Hematoma block at fracture site, or ulnar nerve block (for 4th/5th MC), median/radial nerve block for reduction [9]
• Opioids: Short course only if needed for severe pain or reduction
• Antibiotics: Required for open fractures (first-generation cephalosporin ± aminoglycoside depending on contamination); fight bites require coverage for oral flora (amoxicillin-clavulanate or ampicillin-sulbactam)
• Tetanus prophylaxis if open wound and not up to date
• Avoid: Prolonged opioid prescriptions; topical anesthetics are generally insufficient for reduction

• No specific acute dietary modifications
• Adequate calcium and vitamin D intake for bone healing
• Smoking cessation counseling — smoking delays fracture union
• Adequate protein intake supports healing

• MSK: Pain with grip, inability to make a fist, finger crossing/scissoring
• Neuro: Numbness or tingling in affected digits (ulnar/median nerve distribution)
• Vascular: Color changes, cold digits
• Skin/soft tissue: Lacerations, abrasions, puncture wounds (fight bite)
• Constitutional: Fever (if delayed presentation — concern for infection from open wound)

• Circumstances of injury: Assault vs. accidental — important for fight bite risk and medicolegal documentation
• Alcohol/substance use at time of injury (common association with punch injuries)
• Occupational demands: Manual laborer, musician, athlete — may influence surgical threshold
• Family history: Generally not contributory unless underlying bone disease (e.g., osteogenesis imperfecta in pediatric patients)

• Young males (ages 10–29) — highest incidence [3]
• Contact sports: Football, basketball, martial arts [10-11]
• Alcohol intoxication and altercations
• Occupational exposure: Manual labor, machinery [12]
• Osteoporosis in elderly patients (lower-energy mechanisms)
• Prior hand fractures — risk of re-injury

• Carpometacarpal (CMC) dislocation/fracture-dislocation — often missed on standard views; assess for dorsal prominence at CMC joint
• Bennett fracture (intra-articular fracture-dislocation of 1st MC base) — requires specific management
• Rolando fracture (comminuted intra-articular 1st MC base fracture)
• Tendon rupture/avulsion (extensor or flexor) without fracture
• Soft tissue contusion/sprain — no cortical disruption on imaging
• Carpal fracture (scaphoid, hamate hook) — pain may overlap
• MCP joint dislocation
• Gamekeeper's/skier's thumb (UCL injury of thumb MCP)

• Prior hand/wrist fractures or surgeries
• Inflammatory arthritis, gout (weakened bone)
• Osteoporosis or metabolic bone disease
• Diabetes (impaired healing, infection risk)
• Peripheral neuropathy (may mask symptoms)
• Anticoagulant use (hematoma risk)

• Inspection: Swelling, ecchymosis, loss of knuckle prominence (depressed knuckle sign in neck fractures), rotational deformity, skin wounds
• Palpation: Point tenderness over affected metacarpal; assess each MC individually
• Rotational alignment (critical): Have patient flex all fingers into a fist — all fingertips should point toward the scaphoid tubercle; any scissoring or overlap is pathologic and indicates malrotation [7-8]
• Cascade sign: With fingers in relaxed semiflexion, assess for disruption of the normal cascade
• Grip strength: Compared to contralateral hand
• Neurovascular exam: Capillary refill, two-point discrimination of each digit
• Tendon function: Active flexion/extension of each digit at MCP, PIP, DIP
• Skin integrity: Carefully inspect for open wounds, especially over MCP joints (fight bite)

• Routine labs are not indicated for isolated closed metacarpal fractures
• CBC, CRP/ESR: If concern for infection (delayed presentation with open wound/fight bite)
• Wound culture: If open fracture with signs of infection
• Coagulation studies: If on anticoagulants and considering procedural intervention
• Blood glucose: If diabetic (baseline for healing assessment)

• First-line: 3-view hand radiographs (PA, lateral, oblique) — standard and sufficient for most metacarpal fractures [13]
• Assess for: fracture location (base, shaft, neck, head), angulation, shortening, rotational deformity, articular involvement
• Oblique views are essential — some fractures are occult on PA/lateral alone [13]
• CT scan: Indicated for complex intra-articular fractures (Bennett, Rolando), CMC fracture-dislocations, or surgical planning
• MRI: Rarely needed acutely; useful for occult fractures or associated soft tissue injury
• POCUS: Emerging role in the ED — sensitivity 92%, specificity 87–98% for metacarpal fractures compared to radiography; can guide reduction in real time [9][14-15]
• When imaging is unnecessary: Imaging is always recommended when fracture is clinically suspected

• Point-of-care ultrasound (POCUS): Can diagnose fractures, assess angulation, and guide closed reduction at bedside [9][14-15]
• Rotational assessment maneuver: Active finger flexion to assess for scissoring — the most important clinical test
• Percussion test: Axial loading along the digit may reproduce pain at the fracture site
• Jamar dynamometer: Grip strength measurement (more useful in follow-up)

Acceptable angulation thresholds (traditionally cited, though recent evidence suggests greater tolerance, especially for 5th MC neck): [5][16-18]

A systematic review found that 5th MC neck fractures with up to 70° of palmar angulation can be treated successfully with functional bracing without reduction, with DASH scores uniformly <10. [16] Biomechanical studies suggest 30° as the upper limit for preserved grip mechanics, though clinical outcomes often remain satisfactory beyond this threshold. [17-18]

Any degree of rotational deformity is the most important indication for surgical intervention. [7]

• Not routinely indicated for isolated metacarpal fractures
• Consider if procedural sedation is planned for reduction
• Consider in elderly patients or those with cardiac history presenting after a fall

Classification by location

• Head fractures: Intra-articular; may require surgery if >1 mm step-off or >25% articular surface involvement
• Neck fractures: Most common (especially 5th MC — "boxer's fracture"); apex dorsal angulation [5]
• Shaft fractures: Transverse (direct blow), oblique/spiral (torsional force); watch for shortening and malrotation [20]
• Base fractures: May involve CMC joint; thumb base fractures (Bennett/Rolando) are distinct entities requiring specific management [2]

Severity stratification: Stable, minimally displaced fractures → nonoperative. Unstable, malrotated, significantly shortened (>5 mm), or intra-articular fractures → surgical consultation. [2][7][21]

Complications to consider: Malunion (angular/rotational), nonunion (rare), stiffness (most common functional complication, especially with prolonged immobilization), extensor lag, tendon adhesions, infection (open fractures/fight bites). [4][22-23]

Initial stabilization (ED)

• Ice, elevation, analgesia
• Assess for open fracture and neurovascular status
• Reduce if indicated (significant angulation beyond acceptable limits or rotational deformity)

Closed reduction technique (for neck fractures — Jahss maneuver):

• Flex MCP and PIP joints to 90°
• Apply dorsally directed force on the proximal phalanx to push the metacarpal head dorsally
• POCUS can confirm adequate reduction [9]

Nonoperative management (majority of fractures): [2][20-21]

• Ulnar gutter splint: 4th/5th MC fractures — wrist in slight extension, MCP joints in 70–90° flexion ("intrinsic plus" or "safe" position), IP joints free to move
• Radial gutter splint: 2nd/3rd MC fractures
• Thumb spica splint: 1st MC fractures
• Immobilization duration: 3–4 weeks typically; evidence suggests shorter immobilization (<21 days for shaft fractures) may yield better functional outcomes [20]
• Early mobilization of uninvolved digits and IP joints is critical to prevent stiffness [21]

Surgical indications: [1-2][7]

• Rotational deformity (most important)
• Unacceptable angulation after reduction attempt
• Shortening >5 mm (especially 2nd/3rd MC)
• Intra-articular fractures with >1 mm displacement
• Multiple metacarpal fractures
• Open fractures
• Unstable fracture patterns (comminuted, segmental)

Surgical options: Percutaneous K-wire fixation, intramedullary screw/nail, plate and screw ORIF — choice depends on fracture pattern and surgeon preference. [2][21][24] Intramedullary screw fixation allows earlier return to work (light duty ~1.2 weeks vs. 2.1 weeks nonsurgical). [25]

• Discharge (majority): Stable, closed, nonrotated fractures with adequate splinting and hand surgery/orthopedic follow-up within 1 week
• Observation/admission: Open fractures requiring operative washout, fight bites with joint involvement, vascular compromise, polytrauma
• Urgent hand surgery consultation (ED): Open fractures, irreducible fractures, fight bites with joint penetration, neurovascular compromise, compartment syndrome
• Outpatient hand surgery referral: Fractures meeting surgical indications, intra-articular fractures, failed closed reduction

• Follow-up: Hand surgery or orthopedics within 5–7 days for repeat radiographs and reassessment of alignment
• Repeat imaging at 1–2 weeks to confirm maintained reduction
• Mean return to work: ~5.4 weeks for nonoperative management; light duty as early as 1–2 weeks with surgical fixation [25-26]
• Return to contact sports: NFL data show median return to play of 15 days overall; most miss <3 weeks [27]
• Expected recovery: Fracture union typically at 6–8 weeks; full grip strength recovery may take 3–6 months [28]

Return precautions — instruct patients to return immediately for:

• Increasing pain, swelling, or numbness despite elevation and splinting
• Fingers turning blue, white, or cold
• Inability to move fingers within the splint
• Signs of infection (fever, redness, drainage from any wound)
• Splint becoming too tight or too loose

Patient counseling: Some residual loss of knuckle prominence is cosmetic and expected with 5th MC neck fractures; functional outcomes are generally excellent. Smoking significantly delays healing and should be avoided.

1. Practical Management of Metacarpal Fractures. — Ben-Amotz O, Sammer DM. Plastic and Reconstructive Surgery. 2015.

2. Metacarpal Fractures: An Evidence-Based Review to Guide Treatment. — Stash N, Kamal RN, Richard M, Shapiro LM. The Journal of the American Academy of Orthopaedic Surgeons. 2025.

3. Fractures of the Metacarpals. A Retrospective Analysis of Incidence and Aetiology and a Review of the English-Language Literature. — de Jonge JJ, Kingma J, van der Lei B, Klasen HJ. Injury. 1994.

4. Management of Metacarpal Fractures. — McNemar TB, Howell JW, Chang E. Journal of Hand Therapy : Official Journal of the American Society of Hand Therapists. 2003.

5. Conservative Treatment for Closed Fifth (Small Finger) Metacarpal Neck Fractures. — Poolman RW, Goslings JC, Lee JB, et al. The Cochrane Database of Systematic Reviews. 2005.

6. Ring and Little Finger Metacarpal Fractures: Mechanisms, Locations, and Radiographic Parameters. — Soong M, Got C, Katarincic J. The Journal of Hand Surgery. 2010.

7. Management of Metacarpal Shaft Fractures: A Survey of Current UK Practice. — Taha R, Davis TR, Montgomery AA, Karantana A. Annals of the Royal College of Surgeons of England. 2025.

8. Operative Treatment of Metacarpal and Phalangeal Shaft Fractures. — Kozin SH, Thoder JJ, Lieberman G. The Journal of the American Academy of Orthopaedic Surgeons. 2000.

9. Point-of-Care Ultrasound for Guidance of Closed Reduction of Fifth Metacarpal Neck (Boxer's) Fracture. — Thom C, Han D, Vandersteenhoven P, Ottenhoff J, Kongkatong M. The Journal of Emergency Medicine. 2023.

10. Management of Metacarpal and Phalangeal Fractures in the Athlete. — Wahl EP, Richard MJ. Clinics in Sports Medicine. 2020.

11. Metacarpal Fractures in the Athlete. — Rettig AC, Ryan R, Shelbourne KD, et al. The American Journal of Sports Medicine. 1989.

12. Occupational and Non Occupational Metacarpal Bone Fractures at the Mansoura University Emergency Hospital: A Comparative Study. — El-Hadidy SS, El-Gilany AH, Nour K, Elsherbeny E, Hamied AHA. Toxicology and Industrial Health. 2019.

13. ACR Appropriateness Criteria Acute Hand and Wrist Trauma. — Expert Panel on Musculoskeletal Imaging:, Torabi M, Lenchik L, et al.' Journal of the American College of Radiology : JACR. 2019.

14. The Effectiveness of Bedside Point-of-Care Ultrasonography in the Diagnosis and Management of Metacarpal Fractures. — Kozaci N, Ay MO, Akcimen M, et al. The American Journal of Emergency Medicine. 2015.

15. The Role of Ultrasonography in the Diagnosis of Metacarpal Fractures. — Kocaoğlu S, Özhasenekler A, İçme F, et al. T The American Journal of Emergency Medicine. 2016.

16. Challenging the Dogma: Severely Angulated Neck Fractures of the Fifth Metacarpal Must Be Treated Surgically. — Boeckstyns MEH. The Journal of Hand Surgery, European Volume. 2021.

17. The Biomechanical Effects of Angulated Boxer's Fractures. — Ali A, Hamman J, Mass DP. The Journal of Hand Surgery. 1999.

18. Metacarpal Fracture Angulation Decreases Flexor Mechanical Efficiency in Human Hands. — Birndorf MS, Daley R, Greenwald DP. Plastic and Reconstructive Surgery. 1997.

19. Evidence-Based Medicine: Management of Metacarpal Fractures. — Wong VW, Higgins JP. Plastic and Reconstructive Surgery. 2017.

20. Non-Operative Treatment of Metacarpal Fractures and Patient-Reported Outcomes: A Multicentre Snapshot Study. — de Haas LEM, Jawahier PA, Hendriks TCC, et al. European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society. 2024.

21. Metacarpal Fractures. — Lambi AG, Rowland RJ, Brady NW, Rodriguez DE, Mercer DM. The Journal of Hand Surgery, European Volume. 2023.

22. Impending Malunions of the Hand. Treatment of Subacute, Malaligned Fractures. — Lester B, Mallik A. Clinical Orthopaedics and Related Research. 1996.

23. Corrective Osteotomy for Malunited Metacarpal Fractures: Long-Term Results of a Novel Technique. — Karthik K, Tahmassebi R, Khakha RS, Compson J. The Journal of Hand Surgery, European Volume. 2015.

24. Treatment Outcome of 2nd to 5th Metacarpal Fractures: Kirschner Wires Versus Intramedullary Screws. — Walde M, Schaefer DJ, Kaempfen A. Journal of Clinical Medicine. 2024.

25. Nonsurgical Treatment Versus Intramedullary Fixation of Displaced Metacarpal Shaft Fractures. — Jeffs AD, Allen AD, Zaidi ZS, et al. The Journal of Hand Surgery. 2025.

26. Non-Operative Management of Metacarpal II-IV Fractures: A Retrospective Study From a Tertiary Hand Unit. — Turna A, Stringer I, Jemec B, et al. Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS. 2024.

27. Metacarpal Fractures in the National Football League: Injury Characteristics, Management, and Return to Play. — Sharareh B, Gaston RG, Goldfarb CA, et al. The Journal of Hand Surgery. 2023.

28. Outcomes of Metacarpal Fracture Fixation With Intramedullary Nails: A Systematic Review. — Ahmed SH, Shekouhi R, Kardan R, Gerhold C, Chim H. Annals of Plastic Surgery. 2025.