A Rare Presentation of a Pilar (Trichilemmal) Cyst of the Upper Arm in an Elderly Male

    August 2026 in “ Cureus ”
    Jasndeep Kaler, Ulrica S Armbrister, Taylor Tomko, Frederick Tiesenga
    Studysummary This case study highlights the rare occurrence of a pilar cyst on a patient's upper arm, underscoring the importance of considering this diagnosis even in atypical locations to ensure proper treatment.
    Automatically generated from the study's abstract, not written by a person, and not a review of the full paper. Not medical advice or a treatment recommendation. Read the original study, and consult a qualified healthcare professional before changing treatment. Full disclaimer
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    Research cited in this study 1

    1. A Monoallelic Two-Hit Mechanism in PLCD1 Explains the Genetic Pathogenesis of Hereditary Trichilemmal Cyst Formation ˜The œjournal of investigative dermatology/Journal of investigative dermatology · 2019