MediAI

Jones fracture 1. Definition A Jones fracture is a transverse fracture of the proximal diaphysis of the fifth metatarsal bone , located 1.5 to 3 cm distal to the tuberosity (styloid process). It occurs at the metaphyseal-diaphyseal junction , an area with relatively poor blood supply, which predisposes it to delayed healing or nonunion . 2. Cause and Etiology The primary cause of a Jones fracture is indirect force , typically due to: Inversion and plantarflexion of the foot (e.g., while jumping or twisting). Repetitive stress or chronic overuse, especially in athletes. Acute trauma (e.g., landing awkwardly from a jump or rolling the ankle). Etiologic factors include: Biomechanical imbalances (e.g., cavovarus foot deformity ). Poor footwear or playing surfaces. High-impact sports (e.g., basketball, football, soccer, track and field). 3. Pathophysiology The Jones fracture occurs in a watershed area of blood ...