Accumulation of fluid in the peritoneal cavity (space in the abdomen) giving rise to flank dullness (needs about 1500 ml to detect flank dullness).
Accumulation of fluid in the peritoneal cavity (space in the abdomen) rise to flank dullness (needs about 1500 ml to detect flank dullness). This peritoneal cavity (space in the abdomen) is giving.