This document describes various medical conditions that present with distinct facial features or "facies". Some of the facies described include: 1. Mask-like facies seen in conditions like Parkinson's disease that result in an expressionless face with lack of facial movement or affect. 2. Elfin facies seen in genetic disorders like Williams syndrome, characterized by wide-set eyes, low-set ears, and hirsutism. 3. Moon facies seen in Cushing's syndrome, caused by increased fat deposition on the sides of the face, giving it a rounded appearance.