II. Signs
- Hyperpigmentation and Hypertrichosis
- Overlies a firm nodular base
- Lesion may "ripple" when stroked
III. Distribution
- Anywhere
IV. Differential Diagnosis
- Congenital Malanocytic Nevus (distinguish with biopsy)
V. Labs
- Biopsy shows Arrector Pili Muscles
VI. Course
- No increased risk of malignant transformation
VII. Management
- None