Differential diagnosis of a firm, hyperpigmented, macular skin lesion
| Condition | Characteristics |
|---|---|
| Lentigo maligna | Irregular asymmetric pigmented macules that grow centrifugally |
| Dermatofibrosarcoma protuberans | Similar to dermatofibroma, but larger, irregular border, deeper skin invasion |
| Seborrheic keratosis | Shiny (“oily”), well-demarcated macule or papule, “stuck-on” appearance |
| Epidermoid inclusion cyst | Flat or raised flesh-colored cystic lesion; often has dark central punctum; size varies; may spontaneously drain |
| Dermatofibroma | Slow-growing, firm, tan to reddish-brown papules, < 1 cm, that “dimple” to lateral compression |