<P> The second theory says that synostosis begins when the fetal head gets hindered in the pelvic outlet during birth . </P> <P> The third theory predominates disturbed brain formation of the two frontal lobes as the main issue behind synostosis . Limited growth of the frontal lobes leads to an absence of stimuli for cranial growth, therefore causing premature fusion of the metopic suture . </P> <P> Diagnosis can be characterized by typical facial and cranial deformities . </P> <P> Observatory signs of trigonocephaly are: </P>

Why is my head shaped like a triangle