Background: A thickened endometrium in the postmenopausal patient is a common reason for referral to gynaecology rapid access clinics under the cancer targets wait. This can often be an incidental finding in the asymptomatic patient. Investigation of this can be invasive, uncomfortable and carries significant surgical risk. Aims: This paper aims to summarise all the recent literature to see if there is any clear consensus on who should be further investigated in this select group of patients. Methods: Systematic literature review. Results: The studies varied greatly on the need for further investigation in asymptomatic women with endometrial thickness greater than 11 mm, with some deciding on careful case selection for further investigation, and others investigating every patient. The treatment of asymptomatic patients with endometrium classified as thickened, yet under 11 mm and no symptoms again varied in case selection and further investigation. Endometrial polyps were mentioned in 1 paper, suggesting that asymptomatic polyps need not be removed, which is contrary to current clinical practice. Conclusion: There is no overall opinion as to the exact treatment of women with thickened endometrium. Women should be carefully triaged and all other factors taken into account before further investigation are instigated.