Medial mental sinus.
Lighting is an important tool of the photographer, since it can be used to create shadows to highlight the condition under study. For photographs such as the one shown, oblique lighting is essential.
Burton
J
J
D003751:Dental Fistula / Q000150:complications*; D005148:Facial Dermatoses / Q000175:diagnosis* / Q000209:etiology; D005260:Female; D006801:Humans; D007180:Incisor; D008029:Lighting; D008334:Mandible; D010482:Periapical Abscess / Q000150:complications*; D010781:Photography / Q000379:methods