M60.019

Clinical Causes: Bacterial infections, such as Staphylococcus or Streptococcus species entering through a wound or puncture near the shoulder. Spread of bacterial or viral infections from other parts of the body to the shoulder muscles. Transient bacteremia caused by systemic infections that seed into muscle tissue. Injury or trauma to the shoulder area that introduces infectious agents directly into muscle tissue. Contiguous spread from nearby skin or soft tissue infections.

Key Symptoms: Localized pain in the shoulder that may worsen with movement or touch. Swelling and tenderness in the shoulder muscles. Limited range of motion due to muscle discomfort or swelling. Muscle weakness affecting shoulder movements like lifting or rotating the arm. Possible fever and general malaise if the infection becomes systemic. Redness and warmth over the affected shoulder area.

Diagnosis Path: Diagnosis typically involves a combination of clinical assessment and diagnostic tests. Healthcare professionals may perform a physical examination to evaluate tenderness, swelling, and range of motion. Laboratory tests such as blood cultures and inflammatory markers like ESR or CRP can aid in detecting infection. Imaging studies including ultrasound or MRI provide detailed views of the muscles to identify inflammation, abscesses, or other abnormalities. Sometimes, a muscle biopsy or aspiration might be necessary to identify the causative organism and confirm the diagnosis.

Treatment Protocols: Antibiotic therapy tailored to the identified or suspected pathogen, often administered intravenously initially. Drainage of abscesses or pus collections if present, which might require surgical intervention. Rest and immobilization of the shoulder to reduce strain and facilitate healing. Pain management with medications such as analgesics or anti-inflammatory drugs. Monitoring for complications like the spread of infection or tissue necrosis.