Maisonneuve fx

Maisonneuve fracture: Maisonneuve fracture is a fracture in the proximal fibula. It is usually overlooked since patient is more focused on the pain in the ankle than tenderness or pain in the proximal fibula. Check for maisonneuve fx for fx s/s in the ankle. (1)

Why it works: Forceful external rotation & internal rotation of the ankle cause the separation of the distal edge of the fibula. Fibula is a long bone. As the distal edge is pulled away from the tibula, the part near the proximal end endures great stretch. As a lever, the part near the proximal end breaks away from the proximal end causing a fracture. (1)

Case example: http://manuetcorde.org/2013/03/03/dr-maisonneuve-his-fracture-and-why-students-should-learn-their-eponyms/

X-rays: http://radiopaedia.org/articles/maisonneuve-fracture

Mechanism videos:

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Sources:
(1) https://books.google.com/books?id=YmQ3GGGjDhMC&pg=PA646&dq=maisonneuve+fracture&hl=en&sa=X&ved=0ahUKEwjlzuDXgdDLAhXLJx4KHWGJDM44ChDoAQgpMAM#v=onepage&q=maisonneuve%20fracture&f=false)