The case presented describes the simultaneous occurrence of an unusually large anterior fontanellar bone with a syndrome of vascular malformation and overgrowth in a three-month-old child, which to our knowledge has not yet been reported. This combination may strengthen the arguments for a possible genetic contribution to the occurrence of supernumerary ossicles in the skull. Although of minor clinical importance, the shape and variations of these Wormian bones should be well-known to prevent misleading interpretations of imaging Results.
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