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Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
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Cutaneous Blastomycosis Mimicking Breast Malignancy.

Rose Chisenga1, Tulika Chatterjee1, Zita Erbowor-Becksen1

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Summary

This case report details a rare instance of localized breast blastomycosis in a 50-year-old female. Early diagnosis and treatment with antifungals and antibiotics led to significant recovery.

Keywords:
blastomycosisbreast malignancycutaneous blastomycosisinfectionmimic

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Area of Science:

  • Mycology
  • Infectious Diseases
  • Dermatology

Background:

  • Blastomycosis, a systemic fungal infection caused by *Blastomyces dermatitidis*, typically affects the lungs but can manifest in other organs.
  • Localized cutaneous blastomycosis, particularly affecting the breast, is an infrequent clinical presentation.
  • Distinguishing blastomycosis from other conditions like malignancy or bacterial infections is crucial for timely and effective treatment.

Observation:

  • A 50-year-old female presented with a progressively ulcerating nodule on her left breast, initially suspected to be malignant.
  • Diagnostic workup revealed cutaneous blastomycosis complicated by secondary bacterial infections, including *Staphylococcus aureus* and *Klebsiella oxytoca*.
  • Computed tomography (CT) of the chest showed no evidence of pulmonary involvement, indicating a localized presentation.

Findings:

  • The patient received a seven-day course of Amphotericin B, followed by nine months of oral Itraconazole for blastomycosis.
  • Bacterial superinfections were treated with amoxicillin-clavulanate.
  • Significant clinical improvement was observed at the six-month follow-up evaluation.

Implications:

  • This case highlights the importance of considering blastomycosis in the differential diagnosis of breast lesions, even in the absence of pulmonary symptoms.
  • Cutaneous blastomycosis can mimic various dermatological and neoplastic conditions, potentially leading to diagnostic delays.
  • Prompt recognition and appropriate management combining antifungal and antibiotic therapies are essential for favorable outcomes in localized blastomycosis.