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Perforating pilomatricoma.

N Uchiyama, Y Shindo, T Saida

    Journal of Cutaneous Pathology
    |August 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    A rare case of perforating pilomatricoma, a skin tumor, was observed extruding through the epidermis. This phenomenon, known as transepithelial elimination, offers a unique insight into pilomatricoma presentation.

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    Area of Science:

    • Dermatopathology
    • Surgical Pathology

    Background:

    • Pilomatricoma is a benign skin tumor arising from hair follicle matrix cells.
    • Typically presents as a firm, painless subcutaneous nodule.

    Observation:

    • A cutaneous horn-like lesion, rice-grain sized, appeared on a 51-year-old man's upper arm.
    • Histology confirmed pilomatricoma with a unique feature.

    Findings:

    • A portion of the pilomatricoma mass had extruded through the epidermis.
    • This extrusion occurred via a perforated epidermal channel, suggesting transepithelial elimination.

    Implications:

    • This case highlights an unusual presentation of pilomatricoma.
    • Transepithelial elimination may be a mechanism for pilomatricoma extrusion in some instances.