A 38-year-old woman presented with a prolonged history of chronic deep dyspareunia and secondary dysmenorrhea. She had a normal vaginal delivery of a 3.5 kg baby ten years ago. She had no significant medical or surgical history. The preoperative axial and parasaggital images are attached for your reference.

What is your most likely diagnosis for this patient? *This Case Challenge is from the Editorial Team of Docplexus and is meant for educational purposes only.