Conventional Blue Nevi



Conventional Blue Nevi


Soheil Sam Dadras, MD, PhD










Scanning magnification of a BN shows a symmetrical, wedge-shaped, and evenly pigmented melanocytic tumor present throughout the dermis.






High-power magnification of a conventional BN shows 2 cell types: Spindled to dendritic melanocytes image and melanophages image.


TERMINOLOGY


Abbreviations



  • Blue nevus (BN)


Synonyms



  • Dendritic blue nevus, common blue nevus, Jadassohn-Tièche-type nevus


Definitions



  • Heterogeneous group of acquired and congenital melanocytic tumors


  • Composed predominantly of spindled to dendritic-shaped melanocytes


  • Varying degrees of cellularity, intra- and extracellular melanin content, and dermal sclerosis


ETIOLOGY/PATHOGENESIS


Developmental Anomaly



  • May represent aberrant melanocytic precursor migration in development

Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Conventional Blue Nevi
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