Four observations of "residual ovarian syndrome" are presented. This syndrome is to be discriminated from the one of "the remaining ovary". These observations are discussed and compared with literature data. After bilateral ovariectomy--or adnexectomy--generally difficult, appear with a variable reaction time, different unrelated or coupled symptoms: signs of renewal of ovarian hormonal activity after a phase of surgical menopause, pelvic pains, dyspareunia, et cetera.... Clinical, biology, echography and even tomodensitometry lead to the diagnosis. The treatment can be: the return of surgery, the pelvic irradiation, antigonadotropic progestogens or abstention.