There is no effective screening programme, but occasionally cervical smears contain endometrial cancer cells or double thickness endometrial ultrasonic thickness of 4mm or more indicates a need for endometrial sampling 2003-10-27 Carcinoma of the endometrium 32003-10-27 Carcinoma of the Endometrium 3 There is no effective screening programme，but occasionally cervical smears contain endometrial cancer cells or double thickness endometrial ultrasonic thickness of 4mm or more indicates a need for endometrial sampling．