Which patient is most likely to experience diarrhea?

The patient most likely to experience diarrhea is the 32-year-old female receiving radiation for ovarian and uterine cancer. Radiation therapy can have various side effects, and one of the most common gastrointestinal effects of pelvic radiation is diarrhea. This occurs because radiation can damage the cells lining the intestines, leading to inflammation and changes in bowel function.

Patients undergoing treatment for cancer, particularly in the pelvic region, are at increased risk of developing bowel problems, including diarrhea. This condition can be exacerbated by concurrent chemotherapy, which can further irritate the gastrointestinal tract.

While chemotherapy itself can cause diarrhea, particularly in certain regimens, the specific combination of radiation to the pelvic area has a higher correlation with gastrointestinal complications. Therefore, in this scenario, the radiation therapy is the main contributing factor in this patient's likelihood of experiencing diarrhea compared to the other patients with different conditions or treatments.