Which condition is a degenerative disorder marked by atrophy of the deeper tissues such as fat, muscle, cartilage, and bone, affecting only one side of the face?

Explanation

Parry-Romberg syndrome is a rare degenerative disorder characterized by progressive atrophy of the skin, fat, muscle, cartilage, and bone on one side of the face. Unlike scleroderma or other syndromes listed, it specifically involves unilateral facial tissue wasting.