M60.012

Clinical Causes: Bacterial infections, such as Staphylococcus aureus or Streptococcus species, entering muscle tissue through open wounds or bloodstream. Viral infections that can target muscle tissues, including certain influenza viruses or other pathogens. Fungal infections, less common but possible, especially in immunocompromised individuals. Trauma or injury to the shoulder muscle, which can facilitate infection. Spread from nearby infected tissues or organs. Immunosuppression due to conditions like HIV/AIDS, diabetes, or medication use, increasing susceptibility.

Key Symptoms: Localized pain in the left shoulder that may worsen with movement. Swelling and tenderness around the affected muscle. Restricted range of motion or difficulty moving the shoulder. Muscle weakness in the arm or shoulder area. Fever and chills, especially if the infection is systemic. Possible redness or warmth over the shoulder area. Fatigue and general feeling of illness.

Diagnosis Path: Physical assessment focusing on tenderness, swelling, and range of motion. Blood tests to identify infection markers, such as elevated white blood cell count or inflammatory markers like ESR or CRP. Imaging studies, including MRI or ultrasound, to visualize muscle inflammation and exclude other causes. Muscle biopsy or aspiration of fluid from the affected area for microbiological analysis to identify the infectious organism.

Treatment Protocols: Antibiotic therapy tailored to the specific bacteria or pathogen identified through cultures. Antiviral or antifungal medications if applicable, based on the causative agent. Rest and immobilization of the affected shoulder to reduce strain and facilitate healing. Pain management with analgesics or anti-inflammatory medications. Surgical intervention may be necessary in cases of abscess formation or extensive muscle damage. Monitoring and follow-up to ensure infection resolution and prevent complications.