Magnetic resonance imaging (MRI)-visible 1A endometrial cancer in a 47-year-old woman. A T2-weighted sagittal image shows an endometrial cancer invading the superficial myometrium (arrows). Pathologic examination following hysterectomy confirmed a 4.3 cm grade I endometrioid adenocarcinoma invading superficial myometrium. There was no metastasis in the pelvic lymph nodes. No recurrent cancer has been found 46 months after surgery.