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Related Experiment Videos

Pointillist nevi.

P M Huynh1, E J Glusac, J L Bolognia

  • 1Department of Dermatology, Yale University School of Medicine, 333 Cedar St., New Haven, CT 06520, USA.

Journal of the American Academy of Dermatology
|August 21, 2001
PubMed
Summary

Pointillist nevi, a rare type of benign melanocytic nevus, present as tiny dark dots on a skin-colored background. Histologic examination reveals varied benign correlates for these distinctive pigmented lesions.

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Area of Science:

  • Dermatology
  • Pathology
  • Melanocytic Lesions

Background:

  • Melanocytic nevi and melanoma often exhibit color variation.
  • Pigmentation irregularities can have benign causes, like perifollicular changes.

Purpose of the Study:

  • To correlate clinical and histologic features of unusual melanocytic nevi.
  • To describe "pointillist nevi," characterized by multiple tiny dark dots on a skin-colored background.

Main Methods:

  • Histologic examination of three pointillist nevi from female patients (ages 28, 39, 47).

Main Results:

  • Nevus diameters ranged from 2 to 5.5 mm, with dots measuring 0.1-0.25 mm.
  • Histologic findings included junctional melanocytic nests, dermal pigmented nests, or melanophages.

Conclusions:

  • Pointillist nevi are benign, with histologic features resembling dermoscopic "brown globules."
  • The dots in pointillist nevi are visible without magnification.
  • These nevi expand the spectrum of benign pigmented lesion patterns.

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