Sandbox:DDx HEENT
- Present at birth
- Small, solitary, slow-growing, asymptomatic subcutaneous nodule
- Rubbery subcutaneous nodules
- Nontender, noncompressible, nonpulsatile, mass with a bluish discoloration
- May have a pit or sinus on the surface
- Sack-of-marbles appearance
- Thin walled, unilocular mass with sharply demarcated borders on U/S
- Contains echogenic discret small masses dispersed in a fluid matrix
- Stratified squamous epithelium
- Hair follicles
- Sebaceous glands and apocrine glands