Case reportA 31 year old woman presented in August 1991, and her main complaint was of primary infertility and menorrhagia which she had had for two years. Her basal body temperature record showed an anovulatory pattern. She was of average stature and did not appear malnourished.No hirsutism was noted. Hormone profiles including plasma oestradiol, testosterone, prolactin, follicle stimulating hormone, luteinising hormone, diurnal cortisol and thyroid function tests were normal. Hysterosalpingography showed filling defects in the endometrial cavity and confirmed bilateral tuba1 patency. A hysteroscopic examination was performed, anticipating demonstration of a submucosal leiomyoma or endometrial polyp. Multiple endometrial polypoid masses were biopsied via the hysteroscope, followed by endometrial curettage. The histology report identified a welldifferentiated adenocarcinoma of the endometrium (Fig. 1). Fig. 1. A well differentiated adenocarcinoma. Stromal invasion is evident with the presence of confluent, cribriform glands with little or no intervening stroma. Other areas (not illustrated) showed squamous metaplasia and stromal fibrosis. (H 8c E, x 120).A fractional dilatation and curettage and cervical biopsy were carried out to collect specimens for progesterone and oestrogen receptor assay and also to confirm that there was no extension of tumour to the cervix. Both the receptor assays were positive (oestrogen receptor = 68.3 fmol/mg protein ; progesterone receptor = 99.8 fmol/mg protein). Flow cytometric DNA analysis of the tumour also was performed and revealed diploidy with low proliferative activity (%S = 3.1, %G2M = 5.9). Subsequent investigations, including a chest X-ray, complete blood count and biochemistry, blood sugar, and tumour marker (CA-125, CEA, P-hCG, and AFP) levels were normal. Duplex vaginal sonography showed normal adnexa and a residual endometrial lesion without myometrial invasion with absence of Doppler flow signal and high resistance indices of the uterine arteries. Pelvic and abdominal computerised tomography (CT) scan showed nonenlarged lymph nodes and normal intra-abdominal and pelvic organs, except for an enlarged uterus with an intrauterine lesion.The risks and potential benefits of primary hormone therapy, instead of a standard extirpative surgical approach, were discussed with the patient and she chose hormone therapy. Treatment with tamoxifen (30 mg) and megestrol acetate (160 mg) daily was given.Magnetic resonance imaging (MRI) was not available in our hospital when the treatment began, but when it became available two months later the woman had a negative MRI examination with a thin regular endometrium and intact junctional zone. At two months after hormone therapy began she had a fractional dilatation and curettage which did not identify any residual malignancy (Fig. 2).She continued on hormone therapy and had serial monitoring studies, including sonography, CT or MRI scans, and tumour markers. Four months after treatment began, repeat hysteroscopy and endometrial curettage ...