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Clark's nevus.

J S Metcalf1, J C Maize

  • 1Department of Pathology, Medical University of South Carolina, Charleston 29425, USA.

Seminars in Cutaneous Medicine and Surgery
|April 3, 1999
PubMed
Summary
This summary is machine-generated.

Clark's nevi, previously termed dysplastic nevi, are identified by specific histopathologic features. Their significance varies, potentially marking melanoma risk in familial cases or indicating growth control defects in older individuals.

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Area of Science:

  • Dermatopathology
  • Melanocytic Neoplasms

Background:

  • Clark's nevi are histopathologic terms for lesions previously called dysplastic nevi or nevi with atypia.
  • These nevi exhibit architectural and cytologic atypia.

Purpose of the Study:

  • To define the histopathologic criteria for Clark's nevi.
  • To discuss the clinical significance of Clark's nevi in relation to patient history and melanoma risk.

Main Methods:

  • Histopathologic examination of skin lesions.
  • Evaluation of architectural features: melanocyte distribution, junctional nests, and margins.
  • Assessment of cytologic atypia in scattered melanocytes.

Main Results:

  • Key architectural features include uneven melanocyte distribution, irregular junctional nests, and ill-defined margins.

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  • Cytologic atypia involves scattered atypical melanocytes.
  • Significance varies: doubtful in young, healthy individuals; a marker for dysplastic nevus syndrome in those with melanoma family history; unclear but potentially indicative of growth defects in older patients.

    • Conclusions:

    • Clark's nevi are characterized by specific architectural and cytologic features.
    • Their clinical significance is context-dependent, particularly regarding melanoma risk and familial syndromes.
    • Further investigation may be needed for older patients without a family history of melanoma.