Epigastric: The upper area of the abdomen just below the ribs.
Peritonitis: Inflammation of the peritoneum, i.e. the thin tissue that lines the inner wall of the abdomen.
RLQ: Right lower quadrant of the abdomen.
Abscess: A confines collection of pus.
Sepsis: Sepsis is the body’s inordinate and potentially life-threatening response to an infection.