of unclear origin causing pelvic inflammatory disease and toxic shock syndrome in a previously healthy young woman.

A 22-year-old woman presented to the emergency room with right lower abdominal pain. A CT scan suggested potential appendicitis and perforation. She had no relevant medical or surgical history, and she last had vaginal sex 4 years prior to admission. During surgery, turbid fluid, secondary inflammatory changes, and dilated, fluid-filled fallopian tubes pointed to a diagnosis of pelvic inflammatory disease (PID), so she was started on azithromycin, metronidazole and piperacillin/tazobactam. The following day, she continued to have abdominal pain and developed tachycardia, hypotension, a marked leukemoid response, haemoconcentration, third space fluid accumulation and acidosis. Culture results led to her being further diagnosed with PID with peritonitis and toxic shock syndrome. A gynaecological infection of leading to toxic shock syndrome is both extremely rare and highly fatal. Her antibiotics were changed to meropenem and clindamycin, and she slowly made a full recovery.