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March fracture, also known as fatigue fracture or stress fracture of metatarsal bone is the fracture of the distal third of one of the metatarsals occurring because of recurrent over stress. It is more common in soldiers, but also occurs in hikers, organists, and even those, like hospital doctors, whose duties entail much standing. It mostly occurs in the second metatarsal of the right foot.[1] It is a common cause of foot pain, especially when people suddenly increase their activities.[2] Contents 1 Occurrence 2 Clinical features 3 Diagnostic studies 4 Differential diagnosis 5 Treatment 6 References // Occurrence Stress fracture can occur at many sites in the body, but in particular a stress fracture occurring at metatarsal bones is called a march fracture. March fracture usually occurs in the shaft of the second or less often in the third metatarsal bone; stress fracture of the fifth metatarsal is a distinct fracture (the Jones fracture). In runners, march fracture occurs most often in the metatarsal neck, while in dancers it occurs in the proximal shaft. In ballet dancers, fracture mostly occurs at the base of the second metatarsal and at Lisfranc joints. This fracture always occurs following a prolonged stress or weight bearing, and the history of direct trauma is very rare. Consideration should always be given to osteoporosis and osteomalacia. Cavus feet are a risk factor for march fracture.[3] Clinical features The onset is undramatic. When the boot or shoes are taken off, there is a cramp-like pain in the affected forefoot, and moderate local edema appears on the dorsal aspect. On moving each toe in turn, that of the involved metatarsal causes pain, and when the bone is palpated from the dorsal surface, a point of tenderness is found directly over the lesion. Radiography at this stage is negative, but the condition is diagnosed correctly by military surgeons without the aid of x-rays. In civil life, it is seldom diagnosed correctly for a week or two, when, because of lack of immobilization, there is an excessive deposit of callus (which may be palpable) around the fracture. [4] Diagnostic studies X-ray is seldom helpful, but a CT scan and an MRI study may help in diagnosis.[5] Bone scans are positive early on. Dual energy X-ray absorptiometry is also helpful to rule out comorbid osteoporosis.[6] Differential diagnosis Acute metatarsal fracture. Hallux rigidus. Jones fracture. Sesamoid stress fracture. Acute sesamoid fracture. Proximal fifth metatarsal avulsion fracture.[7] Treatment The first line treatment should be reduction of movements for 6 to 12 weeks. Wooden-soled shoes or a cast should be given for this purpose. In rare cases in which stress fracture occurs with a cavus foot, plantar fascia release may be appropriate.[8] References ^ Hamilton Bailey's Demonstrations of Physical Signs in Clinical Surgery ISBN 0 7506 0625 8 ^ http://orthopedics.about.com/cs/lowerfx/g/march.htm ^ http://www.wheelessonline.com/ortho/metatarsal_stress_frx ^ Hamilton Bailey's Demonstrations of Physical Signs in Clinical Surgery ISBN 0 7506 0625 8 ^ Emergency Orthopedics: The Extremities By Robert Rutha Simon and Steven Koenigsknecht ISBN 0838522106 ^ http://www.wheelessonline.com/ortho/metatarsal_stress_frx ^ http://emedicine.medscape.com/article/85746-diagnosis ^ http://www.wheelessonline.com/ortho/metatarsal_stress_frx v • d • e Injury : Fractures and cartilage injuries (Sx2, 800-829) General Avulsion fracture · Greenstick fracture · Salter-Harris fractures · Spiral fracture Head Skull fracture (Basilar) · Blowout · Mandibular · Nasal · Le Fort fracture of skull Dental trauma: Enamel infraction · Vertical root fracture Vertebral Spinal fracture Cervical: C1 (Jefferson) · C2 (Hangman's) · Flexion teardrop · Extension teardrop Clay-shoveler · Burst · Compression · Wedge · Chance · Hyperextension fracture dislocation · Holdsworth fracture Ribs Rib fracture · Flail chest · Sternal Shoulder, arm and hand Shoulder Clavicle · Scapular Arm humerus: Humerus (Supracondylar, Holstein-Lewis fracture) ulna: Monteggia · Hume radius: Galeazzi · Colles' · Smith's · Barton's · Distal radius · Essex-Lopresti fracture Hand Scaphoid · Rolando · Bennett's · Boxer's Hip, leg and foot Hip/femur Hip fracture · Pelvic fracture (Duverney fracture) Leg tibia: Bumper · Segond · Gosselin · Toddler's fibula: Maisonneuve · Le Fort fracture of ankle · Bosworth both: Trimalleolar · Bimalleolar · Pott's Patella fracture Foot Lisfranc · Jones · March · Calcaneal M: BON/CAR anat(c/f/k/f, u, t/p, l)/phys/devp noco/cong/tumr, sysi/epon, injr proc, drug(M5) M: TTH anat/devp/phys noco/cong/jaws/tumr, epon, injr dent, proc (orth, pros, endo)