10 Symptoms of Melanoma
Reviewed: Dr. Gromatzky
Symptom #6: The Ugly Duckling Concept
The ugly duckling concept was introduced in 1988 based on the observation that nevi (or moles) in one individual tend to look alike. This means that malignant melanoma usually deviates from the usual pattern of nevi on the body.
This realization points to the importance that lesions should not only be evaluated based on their morphology but also compared to other nevi. For example, the suspicious lesion would appear to be darker and larger than the other nevus.
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