The Lisfranc joint refers injury to the base of the toe joints that forms joints with the 4 small middle foot bones.
Injury is caused when an axial load is applied to a foot in a plantar flexed (foot pointed) the classic mechanism is falling out of the stirrups whilst riding a horse.
A low load injury can result in a sprain of the foot ligaments however with increased load a fracture of the bones of the foot and dislocation can occur. It is said to be misdiagnosed in 20% according to literature (Lau, Bozin and Thillainadesan, 2016). Advice and further investigations X-ray / scan from a medical professional is recommended.
Lau S., Bozin M. and Thillainadesan T., 2016, Lisfranc fracture dislocation: a review of a commonly missed injury of the midfoot, Emergency Medicine Journal, found at: http://dx.doi.org/10.1136/emermed-2015-205317