INTRODUCTION: Ossification disorders can affect the stylohyoid ligament as well the stylomandibular ligament. The symptomathology between those syndromes and other pathologies it has been a problem because there is not a guideline. EVIDENCE ACQUISITION: With the aim to establish prevalence, diagnosis and etiopathogenesis of Eagle and Ernest syndromes, a scoping review was performed base on PRISMA criteria. EVIDENCE SYNTHESIS: To review stylohyoid ligament and Eagle Syndrome 93 articles were selected. Three articles regarding the stylomandibular ligament and Ernest Syndrome were founded and selected. CONCLUSIONS: Both syndromes should be clinically diagnosed and corroborate with imaging (2D or 3D), although imaging in Ernest Syndrome is not clear as well in Eagle Syndrome. A decisional algorithm for diagnosis of Eagle Syndrome and Ernest Syndrome is presented.