Clinical Photograph of Equino-Cavus Deformity of Foot

The photograph shows equinus and cavus deformity of the foot in a patient who had post polio residual paralysis as a result of poliomyelitis that he had in childhood.

The deformity is actually equino-cavo-varus but in this picture only two deformities can be appreciated. Equinus is the deformity at ankle in which angle between foot and leg  increases. Cavus is the deformity of  the arches of the foot. When arch of the foot becomes exaggerated,  it is called cavus.

Look at the convexityat the anterior surface near ankle. Normally, it is not so. Normal person keeps his foot and ankle at slightly more than 90 degrees in resting position. This angle in the picture is almost 180 degrees.

Similarly, look at the arch of the foot. It seems unusually high.

This deformity is usually caused by paralytic disorders and is result of imbalance of muscle forces. Poliomyelitis was very common in India. Though it is being effectively checked now, post polio residual paralysis is still commonly seen, a scar that polio almost always leaves.

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