This term is loosely used to describe any fracture that involves one of the lumps or prominences at the lower (distal) end of the tibia or fibula. These lumps are known as the malleoli; Wikipedia seems to say that strictly speaking, a Pott's fracture must involve more than one of them.
The English physician Percivall Pott (1714–88) experienced this injury himself, in 1765, and described his clinical findings in a paper published in 1769.
The same fracture is also known as a Dupuytren fracture, after a French surgeon who lived from 1777 to 1835. (Dupuytren described disruption of the tibio–fibular ligament, which Pott did not.)
An impacted fracture is one where bone fragments are driven into one another.
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