Williams Syndrome Associated With Facial Port-Wine Stain and Phacomatosis Pigmentovascularis: A Case Report.

Williams syndrome (WS) is a rare congenital multi-systemic condition due to gene deletion. We present a rare case of co-existence of WS, port wine stains, and phacomatosis pigmentovascularis. This case emphasizes the importance of recognizing the co-occurrence of such conditions and WS for accurate diagnosis and management.