MELANONYCHIA STRIATA*

Authors

  • Alfred W. Kopf,

    Corresponding author
    1. New York, U.S.A.
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    • **

      Professor, Department of Dermatology, New York University School of Medicine; Head, Oncology Section, Skin & Cancer Unit, University Hospital, New York University Medical Center.

  • Elaine Waldo

    1. New York, U.S.A.
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    • *

      Presented by Dr. Alfred W. Kopf at the Annual Meeting of The Australasian College of Dermatologists. Perth, April, 1980.


  • Associate Professor of Clinical Pathology, Department of Pathology, New York University School of Medicine and Staff Pathology, New York Veterans Administration Medical Center.

Address for reprints: Alfred W. Kopf, M.D., Skin and Cancer Unit, New York University Medical Center, 562 First Avenue, New York, N.Y. 11016, U.S.A.

Summary

Melanonychia striata refers to a pigmented (tan-brown-black) streak due to the presence of melanin in the nail plate and/or nail bed. The streak is caused by a focal increase of the number and/or function of normal appearing or of abnormal melanocytes. Pigmented bands, often involving multiple digits, are prevalent in individuals of the more deeply pigmented races and, in them, are considered to be “normal” in the vast majority of instances.

Among the causes of melanonychia striata are neoplasias including naevocytic naevi, atypical melanocytic hyperplasia, and acral lentiginous melanoma. A series of cases is presented to illustrate these oncological lesions. Until further knowledge is gained, surgical removal is recommended for those lesions resulting in melanonychia striata which fall into the neoplastic group.

It is concluded that much more study is required to determine the biological significance, natural history, and outcome of these periungual melanocytic neoplasias.

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