Congenital dermal melanocytosis confined to the palm

An Unusual Case of Congenital Dermal Melanocytosis

“…In 1999, Grézard et al 4 reported a 45-year-old Caucasian woman with a slowly spreading bilateral congenital pigmentation of the back in a dermatomal distribution from the fourth to the eighth dorsal dermatome that extended laterally to the external part of the breasts. Several authors have also documented cases of isolated small patch forms of congenital dermal melanocytosis [5][6][7] .…”

Late-onset acquired dermal melanocytosis on the hand of a Chinese woman

“…The age of onset also exceeds the characteristic appearance period. [3] Other than growing proportionately to the patient over the years, there had been no change in its size, colour or shape. [1] Over 50% of nevi of Ota and Ito are present at birth, most of the remainder appears around puberty, and they persist for life.…”

“…Mongolian spots usually present at birth and generally regress spontaneously during childhood. [3] Although most dermal melanocytoses are congenital or appear during the childhood or adolescence, there is a rare group with a clearly acquired onset, known as acquired dermal melanocytosis (ADM). [1,2] One case reported the presence of dermal melanocytosis on the palm of left hand since birth.…”

Congenital Dermal Melanocytosis on the Foot: A Case Report and Review of the Literature

“…It is usually divided into four main groups: nevus of Ota, nevus of Ito, blue nevus, and Mongolian spots. Rare variants of dermal melanocytosis that do not belong to these four typical groups are called dermal melanocyte hamartoma, also referred as congenital dermal melanocytosis (CDM) because it mostly appears from birth [2][3][4][5] . Here, we report a case of CDM on the foot with a literature review of previously reported cases of CDM.…”