Related Experiment Video
Updated: Feb 11, 2026

Multifocal Electroretinograms
Published on: December 4, 2011
A Rare Case of Multifocal Prostatic Blue Nevus
Elias J Farran1, Preston S Kerr1, Christopher D Kosarek1
1Division of Urology, Department of Surgery, University of Texas Medical Branch, 301 University Blvd., Galveston, TX, USA.
Abstract:
Prostatic blue nevus is a rare benign pathologic diagnosis most commonly diagnosed incidentally on many different types of prostate specimens. Blue nevus is the deposition of stromal melanin characterized by spindle cells within the fibromuscular stroma which stains positive for melanin-specific stains Fontana-Masson and S100 and stains negative for CD68, HMB45, and iron stains. We report the case of a multifocal and bilateral blue nevus in a 52-year-old Hispanic male who presented with an elevated prostate-specific antigen of 4.3 and mild obstructive lower urinary tract symptoms, found by transrectal ultrasound-guided prostate needle biopsy. The biopsy also revealed benign prostatic tissue with postatrophic hyperplasia and chronic inflammation. This is the 35th reported case of prostatic blue nevus and the third to show multifocal blue nevus.
Related Concept Videos
Frequency-dependent Selection
Gene Evolution - Fast or Slow?
In contrast, regions which code...
Long-term Depression
Case Studies
Nondisjunction
Regression Toward the Mean

