Solitary extensor tendon in the third compartment has a companion: variant course of extensor pollicis brevis in third extensor compartment.

Anomalous variants of the extensor tendons in the first and third compartments of the wrist have been described following cadaveric study. Being aware of such variants during either an elective or emergency hand surgery will prove beneficial in the execution of the extensor tendon repairs. A very few clinical reports are available in the literature.