Compensatory Skull Growth

A precise prediction of characteristic craniofacial abnormalities associated with premature closure of a specific suture assists in differentiating true craniosynostoses from deformational molding. The phenotypic appearance of each individual with craniosynostosis is hardly random. Several basic tenets can be used to predict the characteristic craniofacial abnormalities associated with the premature closure of a given suture [28, 29].

Fusion of a single suture does not simply cause arrest of growth perpendicular to the suture. Metopic synostosis does not cause only a narrow forehead, coronal synostosis does not produce just a unilaterally shortened skull and sagittal synostosis does not simply result in a narrow skull. Instead, compensatory growth occurs at neighboring unfused sutures as well [28]. When the adjacent suture is parallel to the fused suture, bone is deposited symmetrically on either side of the suture. If the adjacent suture is more or less perpendicular to the fused suture, most of the growth will occur in the bone that is distal to the fused suture. In the case of anterior fusion of the sagittal suture, the metopic and coronal sutures are the adjacent sutures (Fig. 25.1a). The metopic suture is parallel to the sagittal suture and the compensatory growth tends to symmetrically widen the frontal bone. Because the coronal sutures are perpendicular to the sagittal suture, the majority of the compensatory growth occurs, not in the parietal bone, but distal to the sagittal suture, creating frontal bossing.

Cure Your Yeast Infection For Good

Cure Your Yeast Infection For Good

The term vaginitis is one that is applied to any inflammation or infection of the vagina, and there are many different conditions that are categorized together under this ‘broad’ heading, including bacterial vaginosis, trichomoniasis and non-infectious vaginitis.

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