['To present the clinical and ultrasound features in patients with endometrial cancer in whom the endometrial thickness was less that 5 mm.', 'Retrospective study on 263 patients with endometrial carcinoma in whom the ultrasound evaluation of the endometrium was performed. The features noticed in the patients with endometrial thickness below 5 mm are presented.', 'In 249 (94.68%) of our patients with endometrial carcinoma the mean endometrial thickness was 15 mm. In 14 patients (5.32%), in whom biopsy was performed prior to ultrasound examination, endometrial thickness was less than 5 mm.'] Is the endovaginal ultrasound finding of a thin and regular endometrium uncommon in endometrial cancer?