Becker’s nevus and epidermal nevi represent distinct yet occasionally overlapping entities within the spectrum of cutaneous hamartomas. Becker’s nevus, typically identified by its circumscribed ... The hyperpigmented patches are evident at birth or become apparent during infancy.

Context Explanation

They favor the trunk, with midline demarcation more often evident ventrally than dorsally and less distinct lateral borders. There are usually no associated extracutaneous anomalies.