Introduction: Masseter muscle is considered to consist of two layers: the superficial and the deep parts. However, in the literature a few cases have been reported of a third layer of the masseter muscle, which is called the coronoid part. The aim of this study is to present such a rare case of the coronoid part of the masseter muscle.
Material and methods: In our study, a case report is presented and enhanced by searching the existing literature in PubMed for other similar cases that recorded the coronoid part of the masseter muscle.
Results: The coronoid part of the masseter muscle was found in a male cadaver of Greek origin that was dissected in the Department of Anatomy, Medical School Athens, Greece.
Conclusions: Good knowledge of anatomy and variations of the masseter muscle are of paramount importance due to their clinical and functional applications as well as during surgical procedures in this anatomical region.