The sign indicates aggravation of the parietal peritoneum by stretching or moving. Positive<unk>  is indicative of peritonitis, which can occur in diseases like appendicitis, and may occur in ulcerative colitis with rebound tenderness in the right lower quadrant. However, in recent years the value of rebound tenderness has been questioned, since it may not add any diagnostic value beyond the observation that the patient has severe tenderness. Use of the sign has been supported by others.
Blumberg sign
Bing's sign
Claybrook sign
Pemberton's sign
Westermark sign
Lincoln sign
Boas' sign
Hoover's sign 