Korean J Dermatol.  2003 Feb;41(2):235-238.

A Case of Dermal Melanocyte Hamartoma

• Park JH
• Lee HS
• Kim SB
• Ryu DS
• Kim KM
• Kim IH

Abstract

Dermal melanocytosis is characterized by the presence of ectopic melanocytes in the dermis. Dermal melanocytosis assumes several morphologic forms, including the Mongolian spot, the blue nevus, the nevus of Ota, the nevus of Ito and dermal melanocytic hamartoma. Differential diagnostic features of these dermal melanocytic lesions depend on onset, course, distribution, histologic features, uniformity of pigmentation, etc. In our case, an 18-year-old girl had asymptomatic 5x3cm sized ill-defined bluish patch on left forearm since birth. Histologic examinations revealed marked increased infiltrate of pigment cells mainly in the upper dermis in Hematoxylin & eosin stain . Fontana-Masson stain and Gp 100 stain revealed marked infiltrate of melanin-containing cells in upper dermis. We report a rare case of dermal melanocyte hamartoma.

Keyword

Dermal melanocyte hamartoma; Fontana-Masson stain; Gp 100 stain

MeSH Terms

Adolescent
Dermis
Eosine Yellowish-(YS)
Female
Forearm
Hamartoma*
Hematoxylin
Humans
Melanocytes*
Mongolian Spot
Nevus
Nevus of Ota
Nevus, Blue
Parturition
Pigmentation
Eosine Yellowish-(YS)
Hematoxylin