Complex sentence: Romberg syndrome (also known as progressive hemifacial atrophy) is a rare neurocutaneous syndrome characterized by progressive shrinkage and degeneration of the tissues beneath the skin, usually on only one side of the face (hemifacial atrophy).
Split into simpler sentences: Romberg syndrome (also known as progressive hemifacial atrophy) is a rare neurocutaneous syndrome. The syndrome is characterized by progressive shrinkage and degeneration of the tissues beneath the skin, usually on only one side of the face (hemifacial atrophy).