Anatomymiddle twist
A 71-year-old woman has coughed violently for 3 weeks. Yesterday, during a bout of coughing, she felt sudden tearing pain in the right lower abdomen and now has a tender swelling there, below the level of the umbilicus. The swelling stays palpable and becomes more prominent when she lifts her head and shoulders off the pillow. There is no bruising in the flank or loin, and the rest of the abdomen is soft with normal bowel sounds.
Bleeding from which one of the following arteries best explains this woman's abdominal wall swelling?