Congenital CD34-positive granular cell dendrocytosis

J Cutan Pathol. 1999 May;26(5):253-8. doi: 10.1111/j.1600-0560.1999.tb01839.x.

Abstract

Granular cell tumors involving the skin are mostly acquired lesions. The Schwann cell origin of these lesions is supported by positive immunostaining for S-100 protein and myelin basic protein. S-100- granular cell lesions rarely have been described in association with fibrous papules or dermatofibromas. The congenital variety of S-100- granular cell tumors occurs almost exclusively in the gingiva. The cell origin of these lesions is not well delineated. We report a hitherto undescribed case of a congenital cutaneous lesion which is histologically characterized by diffuse dermal infiltrates of S-100- but CD34+ granular dermal dendrocytes. The granular appearance of these CD34+ dendrocytes is attributed to an abundance of phagolysosomes. The pathogenetic mechanism of this unusual lesion remains to be elucidated.

Publication types

  • Case Reports

MeSH terms

  • Antigens, CD34 / metabolism*
  • Biopsy
  • Cytoplasmic Granules / pathology
  • Cytoplasmic Granules / ultrastructure
  • Dendritic Cells / metabolism*
  • Dendritic Cells / pathology
  • Dendritic Cells / ultrastructure
  • Granular Cell Tumor / metabolism*
  • Granular Cell Tumor / pathology
  • Granular Cell Tumor / ultrastructure
  • Humans
  • Immunohistochemistry
  • Infant
  • Male
  • Microscopy, Electron
  • Phagosomes / pathology
  • Phagosomes / ultrastructure
  • Skin Neoplasms / metabolism*
  • Skin Neoplasms / pathology
  • Skin Neoplasms / ultrastructure

Substances

  • Antigens, CD34