An abdominal mass is any localized enlargement or swelling in the human abdomen.

It is one of the lines used to define the right upper quadrant of the human abdomen.

The ileocecal fold or ileocaecal fold is an anatomical structure in the human abdomen.

It is one of the lines defining the right upper quadrant of the human abdomen.

In modern times, it is still used in anatomical classification of muscles in the human abdomen such as:

The left lower quadrant (abbreviated LLQ) of the human abdomen is the area left of the midline and below the umbilicus.

Right iliac fossa (RIF) is an anatomical term that refers to the right-inferior part of the surface of the human abdomen.

The spleen usually lies in the left upper quadrant (LUQ) of the human abdomen.

The adrenal arteries are arteries in the human abdomen that supply blood to the adrenal glands.

The hypogastrium (alternative names including hypogastric region, pubic region and suprapubic region) is an area of the human abdomen located below the navel.