Unexpected Diagnosis in Ring Finger Mass - Report - MDSpire

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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Clinical Report: Unexpected Diagnosis in Ring Finger Mass

Overview

An 18-year-old female was diagnosed with digital actinomycosis after surgical excision of a painless mass on her ring finger. Histopathological examination revealed sulfur granules, confirming the diagnosis and highlighting the importance of considering actinomycosis in chronic digital masses.

Background

Actinomycosis is a rare chronic bacterial infection primarily affecting the cervicofacial region, but it can also involve the fingers, which is uncommon. Misdiagnosis can occur as it may mimic malignancies or other chronic infections. Early recognition is crucial for appropriate treatment and to avoid unnecessary interventions.

Data Highlights

No numerical data or trial data available in the article.

Key Findings

  • An 18-year-old female presented with a 2-month history of swelling on her ring finger.
  • Histopathology revealed sulfur granules, confirming actinomycosis.
  • Imaging showed a poorly defined lytic lesion with cortical erosion.
  • Histopathological diagnosis was essential due to the slow growth of Actinomyces species.
  • The patient recovered without recurrence after surgical excision and no prior antibiotic therapy.

Clinical Implications

Clinicians should include actinomycosis in the differential diagnosis for chronic digital masses, especially when imaging suggests bone involvement. Early identification through histopathology can guide appropriate treatment and prevent misdiagnosis.

Conclusion

This case underscores the importance of considering actinomycosis in young patients presenting with unexplained digital masses. Accurate diagnosis through histopathological examination is vital for effective management.

Related Resources & Content

  1. Infection — Persistent tenosynovitis with 'rice bodies' in the hand associated with Mycobacterium intracellulare infection
  2. European Radiology — Clinical and Imaging Insights into Dorsal Wrist Ganglia in Symptomatic Patients Using High-Field MRI
  3. European Radiology — Radiopalmar Ganglion Cysts: Incidence, Characteristics, and Clinical Implications in Wrist MRI Assessments
  4. Actinomycosis - Infectious Diseases - MSD Manual Professional Edition
  5. Medial Femoral Condyle Flap Utilization for Managing Carpo-Metacarpal Instability After Comminuted Hamate Fracture
  6. Actinomycosis - Infectious Diseases - MSD Manual Professional Edition

Original Source(s)

Unexpected Diagnosis in Ring Finger Mass

  • by Jess Allerton

  • February 27, 2026

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