Endometrial sampling for histopathology examination is essential to diagnose endometrial cancer. There are many ways to obtain the specimen including endometrial biopsy or hysteroscopy. Hysteroscopy provides an accurate evaluation of the endometrial cavity and allows directed sampling of suspected lesion. However, there have been concerns that endometrial cells could be flushed into the fallopian tubes and the peritoneal cavity. We performed a literature search using the key words "endometrial cancer," "endometrial sampling," "dilation and curettage" (D&C), "hysteroscopy," and "cancer cells dissemination" and conducted the search in the Medline, EMBASE, and the Cochrane of Database of systematic reviews. Endometrial cell dissemination could occur after hysteroscopy as well as after endometrial biopsy and D&C. Hysteroscopic distension media and intrauterine pressure play a role in endometrial cell dissemination. Hysteroscopy is an additional tool in the diagnosis of endometrial cancer. However, its use in the initial workup is still controversial. In order to minimize the small risk of cancer dissemination, hysteroscopy should be performed with an intrauterine pressure of less than 80 mmHg, and the duration of the procedure should be as short as possible.