A 24-year-old woman presents to the gynecology office with complaints of vaginal discharge. She is currently taking oral contraceptives and atogepant for migraines. Pelvic Examination: A 1 cm polypoid mass is found in the endocervical region. Histology (biopsy findings): Tightly packed glandular or tubular units Cuboidal morphology and clear cytoplasm Question: Which of the following is the most likely diagnosis in this patient?