What Can Erode Through Lungs, Bone and Skin?

Area of Science:

• Infectious Diseases
• Thoracic Surgery
• Medical Microbiology

Background:

• Actinomyces are anaerobic gram-positive bacteria, often oral commensals.
• Thoracic Actinomycosis can present with varied symptoms, sometimes mimicking lung cancer.
• Prompt diagnosis is crucial to prevent invasive procedures.

Purpose of the Study:

• To report a case of thoracic Actinomycosis presenting as a chest wall mass and lung lesion.
• To emphasize the diagnostic utility of microbiology and pathology in Actinomyces infections.
• To illustrate successful non-surgical management of thoracic Actinomycosis.

Main Methods:

• A patient with persistent cough and chest wall swelling underwent CT imaging and fluid aspiration.
• Gram stain and pathology of exudate revealed characteristic filamentous bacteria.
• Treatment involved chest tube drainage and a course of antibiotics (Penicillin G, then Doxycycline).

Main Results:

• CT revealed a large lung lesion with chest wall extension and rib involvement.
• Gram stain showed branching gram-positive rods; pathology noted filamentous organisms.
• Culture confirmed Actinomyces israelii. Treatment led to significant lesion reduction and clinical improvement.

Conclusions:

• Thoracic Actinomycosis requires astute microbiological and pathological evaluation for early diagnosis.
• Antibiotic therapy and drainage can effectively manage Actinomycosis, avoiding invasive thoracic surgery.
• This case demonstrates a favorable outcome with timely diagnosis and appropriate treatment.