Spindled, Infectious, and Unusual Findings in the Breast: A Case-Based Review

 

This lecture will cover a broad spectrum of interesting breast pathology including both benign and malignant entities from ten real cases encountered at the University of Utah Department of Pathology and ARUP Laboratories. The focus is loosely on spindled lesions of the breast, infectious lesions of the breast, and other cases with interesting or surprising results resulting from pathologic examination. Topics covered include cystic neutrophilic granulomatous mastitis, pseudo angiomatous stromal hyperplasia, mammary myofibroblastoma, and demodex folliculitis, among others. The goal is a broad overview of lesions that a general pathologist may encounter in day-to-day practice with suggestions about work-up, comments, or clinical significance discussed.

Originally published on March 4, 2025

Lecture Presenter

Jonathon Mahlow, MD

Jonathon Mahlow, MD

Assistant Professor (Clinical) of Pathology
University of Utah School of Medicine
Pathologist
ARUP Laboratories

Dr. Jonathon Mahlow is a staff pathologist at ARUP and an assistant professor (clinical) at the University of Utah School of Medicine. He received his MD from Wayne State School of Medicine in Detroit and completed his anatomic and clinical pathology residency training at the Cleveland Clinic Foundation. Subsequently, he completed a fellowship in surgical pathology at the University of Utah. Dr. Mahlow is a member of several professional societies, including the United States and Canadian Academy of Pathology and the American Society for Clinical Pathology.

Objectives

After this presentation, participants will be able to:

  • Review a case-based selection of spindle cell breast lesions while acknowledging the importance and limitations of IHC in this endeavor
  • Review a case-based selection of clinically relevant infectious findings in breast biopsies
  • Review some interesting and unexpected findings of (mostly) “interesting” cases in breast pathology and correlate these findings with anatomic distribution of breast tissue

Sponsored by:

University of Utah School of Medicine, Department of Pathology, and ARUP Laboratories