The endovaginal ultrasound finding of a thin and regular endometrium is uncommon in endometrial cancer

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.

A thin and regular endometrium (below 5 mm) rules out an endometrial carcinoma provided that no biopsy has been performed within 3 months before ultrasound examination.