An important anatomic variation in head and neck region: anomaly of the anterior belly of the digastric muscle.

Anomalies of the anterior belly of the digastric muscle are not very rare. An anomaly in this region may have clinical significances. In this study, bilateral anomalies of the anterior bellies of both digastric muscles are presented. When an asymmetry in the floor of the mouth is detected during diagnostic procedures like radiologic studies, anomalies of the anterior belly of the digastric muscle should also be considered besides other reasons of asymmetry. Additionally, possible occurrence of this kind of anomalies should be remembered during surgical procedure involving this region.