Interactive Case Study - July 2025






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Acknowledgements
Author Profiles

Laura K. Archibald, MD
University of Minnesota Department of Dermatology
Laura Archibald, MD is the Micrographic Surgery and Dermatologic Oncology Fellow at the University of Minnesota for the 2023-2024 academic year. She received her undergraduate training at the University of Michigan then her medical degree at Case Western Reserve University School of Medicine. She graduated from dermatology residency at the University of Minnesota in June 2023.

Carlos Iwamoto, MD
Minneapolis VA Medical Center
Carlos Iwamoto, MD, is an anatomic and clinical pathologist and Director of the Immunohistochemistry Lab at the Minneapolis VA Health Care System in Minneapolis, MN. He completed his medical degree at University of San Marcos in Lima, Peru. He did his pathology (AP/CP) residency at the University of Illinois in Chicago, Surgical Pathology fellowship at the University of Minnesota in Minneapolis, MN and Oncologic Pathology fellowship at Memorial Sloan-Kettering Cancer Center in New York, NY. He is also an Adjunct Assistant Professor at the university of MN Department of Lab Medicine and Pathology.
Daniel R. Knabel, MD
Medical College of Wisconsin
Daniel Knabel, MD is currently a board-certified dermatologist, dermatopathologist, and Mohs micrographic surgeon at the Medical College of Wisconsin. He received his medical degree from the Medical College of Wisconsin. He completed dermatology residency and dermatopathology fellowship at the Cleveland Clinic. He then completed Micrographic Surgery and Dermatologic Oncology fellowship at the University of Minnesota.
Question:
86-year-old male with a painful growing plaque on the scalp
Category
Tumors > Fibrous/Mesenchymal
Description