Enlarged Parietal Foramina
Note symmetric well defined large foramina in both parietal bones representing Enlarged Parietal Foramina. Finding is known to be associated with genetic defect that influences cranial maturation. In some patients it can be associated with structural brain anomalies.
Above image showing Normal Parietal Foramina - for comparison.
You might also find some further details at Genetics Home Reference - Enlarged Parietal Foramina.