Endometrial carcinoma is the most commonly diagnosed malignancy in the female reproductive tract, mainly affecting women in their postmenopausal years. Although rare, it can also present in premenopausal women. The most common clinical presentation is episodes of abnormal uterine bleeding. Magnetic resonance imaging (MRI), computed tomography (CT), and sonography are imaging modalities used to detect endometrial carcinoma. However, a conclusive diagnosis is made through endometrial biopsy. A case is reported of endometrial distension with endometrial carcinoma and cervical stenosis listed as differentials and originally detected through CT. Sonographic assessment showed an irregular thickened endometrium and an endometrial cavity containing fluid with low-level echoes and areas of polypoid masslike tissue. Based on these findings, the patient underwent an endometrial biopsy that provided confirmation of endometrioid adenocarcinoma (International Federation of Gynecology and Obstetrics [FIGO] Stage 1).