RESUMEN
BACKGROUND Necrotizing fasciitis is an aggressive type of skin and soft tissue infection that results in necrosis of subcutaneous tissues, including muscle and fascia. Mixed bacteria, including gas-forming organisms, are usually identified. This report describes a 55-year-old male diabetic patient with herpes zoster involving the thoracic dermatomes complicated by skin infection, necrotizing fasciitis, chest wall abscess, and sepsis. CASE REPORT A 55-year-old man with diabetes mellitus presented with thoracic herpes zoster, initially treated with acyclovir and topical agents. He developed swelling, pain, and fever over the left chest, which was unresponsive to topical treatment. Investigations revealed elevated white blood cells and gas on chest X-ray. Computed tomography confirmed a 13×6×11-cm abscess with gas between the latissimus dorsi and serratus anterior muscles, suggesting necrosis. He received intravenous amoxicillin/clavulanic acid and metronidazole and underwent urgent surgical drainage, yielding 200 mL of pus. Cultures identified antibiotic-sensitive Staphylococcus aureus and Clostridium perfringens. Histopathology confirmed necrotizing tissue with acute bacterial inflammation. He was treated postoperatively with dressings and vacuum-assisted closure, followed by sutures, and was discharged in good condition after 16 days. CONCLUSIONS This case underscores the aggressive nature and potential complications of necrotizing soft tissue infections in patients with diabetes mellitus and herpes zoster. Prompt recognition, early intervention with appropriate antibiotics, and surgical drainage are crucial in managing such infections effectively. The successful use of vacuum-assisted closure therapy underscores its role in facilitating wound healing after debridement. Clinicians should maintain vigilance for necrotizing infections in similar high-risk patients to ensure early intervention and improve clinical outcomes.