Muscle anomalies in the deep compartment of the forearm are rarely seen and generally do not cause any clinical findings. The flexor indicis profundus (FIP) muscle, which has a separate muscle belly from that of the flexor digitorum profundus (FDP) muscle, is one of the muscle variations in the deep compartment of the forearm. Here, we present a case of a patient with this rare anomaly detected during an operation for a hand injury. No pathologic finding was seen after the operation.
Key words: Muscle,tendon, anomaly, flexor indicis profundus (FIP), hand, injury