Occurrence of a musculus abductor digiti minimi longus

Whilst dissecting the body of a 79 year old male we observed an accessory muscle in the right lower limb which has not yet been described. The Musculus abductor digiti minimi longus consisted of two portions originating from the dorsal parts of the supracondylar regions of the fibula and the tibia. Both heads merged distally forming a 2 mm thick tendon that curved around the Malleolus medialis, ran across the deep Planta pedis and inserted together with the Musculus abductor digiti minimi at the Facies lateralis of the Phalanx proximalis digiti quinti.