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Unexpected Diagnosis in Ring Finger Mass

Histopathology reveals digital actinomycosis in a young patient.

  • By

  • Jess Allerton

  • February 27, 2026

  • 2 min

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  • 1

    An 18-year-old female was diagnosed with digital actinomycosis after surgical removal of a painless mass on her ring finger.

  • 2

    Actinomycosis is a chronic bacterial infection caused by Actinomyces species, typically affecting the cervicofacial region.

  • 3

    The patient presented with a 2-month history of swelling, and imaging revealed a poorly defined lytic lesion with cortical erosion.

  • 4

    Histopathology confirmed the diagnosis by identifying sulfur granules and excluding mycobacterial infection through staining.

  • 5

    The case emphasizes the need to consider actinomycosis in chronic digital masses, as early recognition can prevent misdiagnosis.

Original Source(s)

Unexpected Diagnosis in Ring Finger Mass

  • by Jess Allerton

  • February 27, 2026

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