Abdominal Quadrants, Organs, and Associated Conditions

These flashcards review the four abdominal quadrants, their key organs, and common conditions associated with pain in each region.

Right Upper Quadrant (RUQ)

Houses the right lobe of the liver, gallbladder, right kidney, portions of the ascending and transverse colon, and parts of the small intestine; pain here often signals gallbladder or liver infection/inflammation or peptic ulcers.

Left Upper Quadrant (LUQ)

Contains the left lobe of the liver, part of the stomach, pancreas, left kidney, spleen, and portions of the transverse and descending colon, plus parts of the small intestine; pain is commonly linked to intestinal or colonic malrotation.

Right Lower Quadrant (RLQ)

Includes the cecum, appendix, part of the small intestine, right ureter, and the right half of the female reproductive system; pain is most frequently associated with appendicitis.

Left Lower Quadrant (LLQ)

Contains the majority of the small intestine, some large intestine, left ureter, and the left half of the female reproductive system; pain often relates to colitis, pelvic inflammatory disease, or ovarian cysts.

Appendicitis

Inflammation of the appendix, typically producing sharp pain in the right lower quadrant.

Colitis

Inflammation of the large intestine (colon), frequently causing left lower quadrant abdominal pain.

Malrotation of the Intestine

Congenital twisting or improper positioning of the intestines, often manifesting as pain in the left upper quadrant.

Peptic Ulcer

A sore in the lining of the stomach or duodenum; can refer pain to the right upper quadrant.

Pelvic Inflammatory Disease (PID)

Infection of the female reproductive organs, commonly leading to left lower quadrant pain.

Ovarian Cyst

Fluid-filled sac on an ovary that may cause pain in the left lower quadrant when present on the left ovary.