What is Hysterosalpingography test?
Hysterosalpingography (HSG) or an HSG test is an internal examination of the uterus and fallopian tubes. This technique uses a special type of X-ray called fluoroscopy and a contrast medium to obtain images of the uterine cavity and fallopian tubes. An HSG test is most commonly used to examine the morphology of uterus and cervix and assess the level of obstruction (patency), if any, in fallopian tubes. Imaging is most useful in finding abnormalities that can be an underlying cause of infertility. It is a cost-effective and simple technique that can help detect blockages, polyps and salpingitis isthmica nodosa (SIN).
SIN is characterised by nodular thickening of fallopian tube due to inflammation. It is often recommended after the reports of transvaginal ultrasound imaging are obtained and when further investigation is needed.