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Metatarsal Stress Fracture
Updated: Sep 26, 2007
Introduction
Background
With an increase in public interest in physical fitness, clinical practitioners are diagnosing stress fractures with greater frequency.1 First described by Aristotle in 200 BC, stress fractures were initially recorded in the medical literature in 1855 by the Prussian military physician Breithaupt, who described what is now known as a march fracture, or stress fracture of the metatarsals.
Metatarsal stress fractures are not limited to high-level athletes or military recruits. This type of injury is seen in runners of all levels, as well as ballet dancers and gymnasts and patients with rheumatoid arthritis (RA), metabolic bone disease, and neuropathic conditions.2 Metatarsal stress fractures are also seen with increasing frequency in patients who engage in aerobics activities, particularly high-impact aerobics.
Frequency
United States
The incidence of stress fractures in the general population is unknown, as virtually all literature on the subject is derived from a military population or advanced-level athletes. Stress fractures are estimated to constitute up to 16% of all injuries that are related to athletic participation; running is the cause in most of these cases. Most stress fractures (95%) involve the lower extremities, particularly the metatarsals.
Functional Anatomy
The second and third metatarsals are relatively fixed in position within the foot; the first, fourth, and fifth metatarsals are relatively mobile. More stress is placed on the second and third metatarsals during ambulation; thus, these bones are at increased risk for stress fractures.
The fifth metatarsal, which is approximately 1.5 cm from the proximal pole of the bone, bears greater stress in those who oversupinate when they walk or run. The fifth metatarsal also has a diminished blood supply and, thus, a decreased ability to heal.
Stress fractures of the proximal fifth metatarsal must be distinguished from proximal avulsion fractures ("pseudo-Jones" fractures) and Jones fractures. The proximal avulsion fracture is usually associated with a lateral ankle strain and occurs at the insertion of the peroneus brevis tendon. The true Jones fracture is an acute fracture of the proximal diametaphyseal junction.
Clinical
History
- Patients usually report having increased the intensity or duration of their exercise regimen.
- Initially, dull pain only occurs with exercise, then the condition progresses to pain at rest.
- Pain starts diffusely, then localizes to the site of the fracture.
- Stress fractures can be historically distinguished from a true Jones fracture, because patients with a stress mechanism as the etiology report a long history of prodromal symptoms of pain over the proximal fifth metatarsal.
- Menstrual irregularities should be explored in female patients due to a high association between female athletics, amenorrhea, and osteoporosis — otherwise known as the female athletic triad.3,4
Physical
- Inspect the affected foot for swelling, bruising, or warmth.
- Inspect both feet for a side-by-side comparison.
- Palpate the affected foot to find the point of maximal tenderness. Specifically seek to determine if the point of maximal tenderness is related to bony or soft-tissue problems.
- Inspect the patient's athletic shoes for signs of excessive supination or excessive wear under the metatarsal heads.
Causes
- Increased intensity, duration, or frequency of exercise
- New footwear
- Insufficient rest periods
- Continuing to train despite pain
- Osteopenia/osteoporosis
- Rheumatoid arthritis
- Neuropathic foot
- Female athletic triad
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Overview: Metatarsal Stress Fracture |
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| Multimedia: Metatarsal Stress Fracture |
| References |
| Further Reading |
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References
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Kiuru MJ, Pihlajamaki HK, Hietanen HJ, Ahovuo JA. MR imaging, bone scintigraphy, and radiography in bone stress injuries of the pelvis and the lower extremity. Acta Radiol. Mar 2002;43(2):207-12. [Medline].
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Brukner P, Bradshaw C, Bennell K. Managing common stress fractures: let risk level guide management. Phys Sports Med. 1998;26(8):39-47.
Burr DB. Bone, exercise, and stress fractures. Exerc Sport Sci Rev. 1997;25:171-94. [Medline].
Chen RC, Shia DS, Kamath GV, Thomas AB, Wright RW. Troublesome stress fractures of the foot and ankle. Sports Med Arthrosc. Dec 2006;14(4):246-51. [Medline].
Chuckpaiwong B, Cook C, Pietrobon R, Nunley JA. Second metatarsal stress fracture in sport: comparative risk factors between proximal and non-proximal locations. Br J Sports Med. Aug 2007;41(8):510-4. [Medline].
Coady CM, Micheli LJ. Stress fractures in the pediatric athlete. Clin Sports Med. Apr 1997;16(2):225-38. [Medline].
Fredericson M, Jennings F, Beaulieu C, Matheson GO. Stress fractures in athletes. Top Magn Reson Imaging. Oct 2006;17(5):309-25. [Medline].
Guettler JH, Ruskan GJ, Bytomski JR, et al. Fifth metatarsal stress fractures in elite basketball players: evaluation of forces acting on the fifth metatarsal. Am J Orthop. Nov 2006;35(11):532-6. [Medline].
Heaslet MW, Kanda-Mehtani SL. Return-to-activity levels in 96 athletes with stress fractures of the foot, ankle, and leg: a retrospective analysis. J Am Podiatr Med Assoc. Jan-Feb 2007;97(1):81-4. [Medline].
Knapp TP, Garrett WE Jr. Stress fractures: general concepts. Clin Sports Med. Apr 1997;16(2):339-56. [Medline].
Nagel A, Fernholz F, Kibele C, Rosenbaum D. Long distance running increases plantar pressures beneath the metatarsal heads: a barefoot walking investigation of 200 marathon runners. Gait Posture. Feb 2 2007;epub ahead of print. [Medline].
Queen RM, Crowder TT, Johnson H, Ozumba D, Toth AP. Treatment of metatarsal stress fractures: case reports. Foot Ankle Int. Apr 2007;28(4):506-10. [Medline].
Quill GE Jr. Fractures of the proximal fifth metatarsal. Orthop Clin North Am. Apr 1995;26(2):353-61. [Medline].
Sammarco GJ. The Jones fracture. Instr Course Lect. 1993;42:201-5. [Medline].
Torg JS, Balduini FC, Zelko RR, et al. Fractures of the base of the fifth metatarsal distal to the tuberosity. Classification and guidelines for non-surgical and surgical management. J Bone Joint Surg Am. Feb 1984;66(2):209-14. [Medline]. [Full Text].
Further Reading
Gehrmann RM, Renard RL. Current concepts review: stress fractures of the foot. Foot Ankle Int. Sep 2006;27(9):750-7. [Medline].
Keywords
march fracture, stress fracture of the metatarsals, foot fracture, foot stress fracture, broken foot, fractured foot, female athlete triad, Breithaupt fracture
Overview: Metatarsal Stress Fracture