All our hysteroscopic observations over the last 10 years strongly sup
port that tamoxifen has an endometrial effect not seen with synthetic
oestrogens. The development of small sized instruments, combined with
an atraumatic insertion technique have made hysteroscopy a simple and
safe procedure that can be performed on an outpatient base without any
form of anaesthesia and with good patient compliance. In long-term ta
moxifen users, hysteroscopy enables us to differentiate between atroph
ic endometria with glandulocystic changes in the underlying stroma and
endometrial polyps mainly of the glandulocystic type. The diagnostic
value of direct visualisation with the advantage of being able to guid
e endometrial biopsies is superior to any indirect technique Like tran
svaginal ultrasonography (TVU). (C) 1998 Elsevier Science Ltd. All rig
hts reserved.