Melanocytic nevi of palms and soles: A histological study according to the plane of section

Sabina Signoretti, Giorgio Annessi, Pietro Puddu, Tullio Faraggiana

Research output: Contribution to journalArticle

Abstract

Melanocytic nevi of palms and soles (MNPS) cause diagnostic problems to dermatopathologists because they share histologic features with malignant melanoma (MM). Early MNPS frequently display a striate appearance, suggesting that, in this subset of nevi, both melanocytes and melanin might have a particular distribution in relation to dermatoglyphics. To verify this hypothesis, we undertook a histological study on 78 junctional MNPS sampled along a plane either perpendicular or parallel to dermatoglyphics. Histologic examination revealed symmetry in 56% of the lesions, circumscription in 60%, intraepidermal scatter of melanocytes in 79%, and melanin columns in 61%. Interestingly, comparison between histologic features of nevi sampled perpendicularly and those of nevi cut parallely to dematoglyphics showed that features of benignity, namely symmetry, circumscription and melanin columns, were significantly more frequent in lesions dissected along a perpendicular plane. Moreover, in 70% of perpendicular samples, intraepidermal scatter of melanocytes and melanin columns were strictly concentrated in furrows. Therefore, to avoid diagnostic pitfalls in the differentiation between junctional MNPS and MM, we strongly suggest to dissect MNPS along a plane perpendicular to skin markings. We hypothesize that mechanical stress can be responsible for concentration of intraepidermal scatter of melanocytes and melanin columns in skin furrows.

Original languageEnglish
Pages (from-to)283-287
Number of pages5
JournalAmerican Journal of Surgical Pathology
Volume23
Issue number3
DOIs
Publication statusPublished - Mar 1999

Keywords

  • Intraepidermal scatter of melanocytes
  • Melanin columns
  • Melanocytic nevi
  • Volar skin

ASJC Scopus subject areas

  • Anatomy
  • Pathology and Forensic Medicine

Fingerprint Dive into the research topics of 'Melanocytic nevi of palms and soles: A histological study according to the plane of section'. Together they form a unique fingerprint.

  • Cite this