Is there any other conditions in women that can be confused with appendicitis?

Many: The appendix is located in the right-lower abdomen, often very close to the right ovary and fallopian tube. Any process that causes pain in this region can be confused with appendicitis, including a ruptured ovarian cyst, ovarian torsion, pelvic inflammatory disease, ectopic pregnancy, etc. By taking a history, examination, lab tests, +/- ct of the abdomen or ultrasound, we can often make the dx.

Yes, several: The appendix is in the right lower abdomen- so is one ovary and egg tube, and a lot of the small intestine; and the uterus, bladder, and rectum are right next door. Right lower abdominal pain could be: appendicitis, ovarian cyst, normal ovulation, infection or twist of the ovary or tube, uterine fibroid, endometriosis, urinary infection or stone, constipation, flu, hernia, to name the most common.