The glabella may show the remains of the: (A) Anterior fontanel, (B) Posterior fontanel, (C) Metopic suture, (D) Lambdoid suture
Answer is C. Metopic suture is occasionally present in about 3-8% individuals. It lies in the median plane and separates the two halves of the frontal bone. Normally it fuses at 6 years of age. Ref BDC volume 3,sixth edition pg 5