By Gary M. White, MD

Medallion-Like Dermal Dendrocyte Hamartoma (MLDDH) is a rare, congenital lesion in the shape of a medallion and is caused by the presence of dermal dendrocytes.


The solitary, asymptomatic, congenital lesion is typically round, oval or triangular in shape, several centimeters in diameter, brown or erythematous in color, with well-defined borders, and with a slightly atrophic wrinkled surface. Biopsy with immunostaining allows diagnosis of this rare benign lesion. Rarely, lesions may be acquired or be factor XIIIa–negative.


No treatment is needed. Surgical excision, if feasible, may be done.


A 20-year-old man with a congenital, asymptomatic plaque on the anterior aspect of his neck. Dermatology Online Journal 17 (9)


Homepage | FAQs | Use of Images | Contact Dr. White

It is not the intention of to provide specific medical advice, diagnosis or treatment. only intends to provide users with information regarding various medical conditions for educational purposes and will not provide specific medical advice. Information on is not intended as a substitute for seeking medical treatment and you should always seek the advice of a qualified healthcare provider for diagnosis and for answers to your individual questions. Information contained on should never cause you to disregard professional medical advice or delay seeking treatment. If you live in the United States and believe you are having a medical emergency call 911 immediately.