The differential diagnosis of melanoma refers to the set of conditions that may have similar signs and symptoms to melanoma, and therefore must be considered when trying to establish a definitive diagnosis.
Here are some of the main conditions that may require a differential diagnosis in the case of melanoma:
|Pigmented seborrheic keratosis
|It is a melanoma imitator, differential diagnosis is not easy, dermoscopy helps.
|The nevus returns to its normal appearance after about 10 days
|Pigmented basal cell carcinoma
|Presence of surface telangiectasia and specific dermoscopic aspects
|Prevails in sun-exposed areas, it is symmetrical
|A blue-colored nevus due to the deep localization of melanocytes, it does not change over time, its degeneration into melanoma is rare
|Distinguishing it from melanoma is not easy, they are vascular tumors. Dermoscopy is decisive for a correct diagnosis
|It can mimic melanoma, but it has an immediate onset and disappears in 10 days
|It is found on the lips and sometimes in the earlobes, it partially disappears with finger pressure
|It does not change over time and often disappears with finger pressure
|It often appears after a folliculitis, it does not change over time and has distinctive characteristics on dermoscopy
|Pigmented actinic keratosis
|Affects the exposed regions and does not present the typical dermoscopy of melanoma