| • | AKA linear papular ectodermal-mesodermal hamartoma |
| • | linear arrays of flesh colored papules on forehead and post-auricular |
| • | encountered almost exclusively in black skin (more common among those institutionalized for mental retardation) |
| • | histology: hyperplasia of both epidermal and dermal structures (incl. sebaceous glands, nerves, collagenous and elastic fibers) |
| • | ddx: papular mucinoses, lichen nitidus, sarcoidosis, acne vulgaris |
Sebaceous Glands (normal variants):
| • | juxtaclavicular beaded lines |
| • | hamartoma moniliformis – normal variant in which there is minor fibrosis around otherwise apparently normal follicular structures on the nose, temples, forehead, and neck |
| • | Fordyce spots = ectopic sebaceous glands best seen on buccal mucosa just inside lips |
| • | also seen on penis, vulva, and areola |
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