Abscess/diagnostic imaging; Community-Acquired Infections/diagnostic imaging; Staphylococcal Infections/diagnostic imaging; Myositis/diagnostic imaging; Methicillin-Resistant Staphylococcus aureus/isolation & purification; Tomography, X-Ray Computed; Psoas Abscess/surgery; Psoas Abscess/diagnostic imaging; Psoas Abscess/microbiology; Psoas Abscess/drug therapy; Abscess/surgery; Abscess/microbiology; Abscess/drug therapy; Anti-Bacterial Agents/therapeutic use; Thigh; Debridement; Drainage; Female; Humans; Immunocompetence; Community-Acquired Infections/surgery; Community-Acquired Infections/microbiology; Community-Acquired Infections/drug therapy; Staphylococcal Infections/surgery; Staphylococcal Infections/microbiology; Staphylococcal Infections/drug therapy; Myositis/surgery; Myositis/microbiology; Myositis/drug therapy; Osteomyelitis/surgery; Osteomyelitis/microbiology; Osteomyelitis/drug therapy; Periosteum/surgery; Periosteum/microbiology; Middle Aged; Drug Therapy, Combination; Recurrence; Sacroiliitis/surgery; Sacroiliitis/microbiology; Sacroiliitis/drug therapy; Combined Modality Therapy