A second diagnostic point is the abnormal position of the calcaneus and scaphoid with relation to the malleoli and astragalus.
In all these injuries the body of the talus loses its normal relationship with the malleoli.
The talus is felt in front of the tibia, and the malleoli appear to be displaced backwards and to lie nearer the sole.
The ankle joint is greatly swollen, the depression, normally present in front of and behind the malleoli, being obliterated.
This form is less often accompanied by a fracture of the malleoli than is the case in the backward dislocation.
If there is extensive comminution of the os calcis or astragalus, the malleoli may be a little lower than normal.
There is great tenderness between the tibia and fibula at the front of the ankle, and over the points of fracture in the malleoli.
malleolus mal·le·o·lus (mə-lē'ə-ləs)
n. pl. mal·le·o·li (-lī')
A rounded bony prominence, such as those on either side of the ankle joint.