Pathologic features of endometrial carcinoma in elderly women.

It has been estimated that more than two-thirds of cancers occur in people over 65 years of age: endometrial cancer (EC) is the most common gynaecologic cancer in the U.S. and represents the fourth most common malignancy in women. Some authors have reported that EC in elderly women was more aggressive, histologically less-differentiated and often non-endometrioid when compared with EC in the younger population. The purpose of this retrospective study is to evaluate the pathologic features of EC in women 70 years old or over compared with those of younger patients. Between 1987 and 1997, 174 patients with EC were surgically treated: 52 women were 70 years old or over. Two-thirds of both groups had surgical Stage I tumors: 54% of surgical Stage I tumors in the elderly had myometrial invasion more than 50% compared with 32% in the younger group (p<0.01). On the whole 37% of elderly patients had Stage IC tumors compared with 21% in younger women (p<0.01). Seventy-five percent of elderly women had Grade 2 or 3 tumors compared with 55% of younger patients (p<0.005). The majority of EC was endometrioid in both groups: 8% of elderly patients had clear-cell carcinomas compared with 4% of younger women (p not significant). No elderly patients showed nodal metastasis (0 out of 10): 9% of younger women had pelvic or para-aortic metastasis. The median follow-up was 78 months. The overall survival in the elderly and in the younger group was 80% and 93%, respectively (p<0.01): in elderly women overall survival significantly varied according to histotype and depth of myometrial invasion in Stage I tumors. In conclusion patients 70 years old or over have a high probability of surgical Stage I EC but a significantly higher probability of deep myometrial invasion and less-differentiated tumors than younger women: the prognosis w as good but poorer than for younger patients.