Uterine Septum
What is Uterine Septum?
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Uterine septum is the most common congenital anomaly of the uterus and may increase pregnancy loss.
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How do I know that I have it?
It is very unlikely that this condition will be diagnosed prior to visiting a fertility specialist. Most of the patients will not have any symptoms or any other problems associated with the uterine septum except when trying to become pregnant. Up to this point it is unlikely that you have had a reason to have a transvaginal ultrasound performed. Even if you had a transvaginal ultrasound, very few patients actually get diagnosed with a uterine septum. The reason is that the shape and form of the uterus might not be clearly appreciated during a routine scan. It is very easy to miss it on a 2-D ultrasound.Most of the uterine septi are diagnosed by fertility subspecialists, after the patient presents with recurrent pregnancy loss. Some clinics report that 20 to 30% of their patients have more or less evidence of a septate uterus. A skilled ultrasonographer can diagnose the septum on a regular two dimensional (2-D) ultrasound by sweeping the probe from side to side, however a 3-dimensional (3-D) ultrasound can give an unmatched view of the uterine shape. It is important that your fertility specialists make the correct diagnosis of the uterine septum versus a bicornuate uters. The uterine septum contains a separation in the uterine cavity, however the outer appearance of the uterus is normal. A bicornuate uterus on the other hand has a completely separated upper end both internally and externally. Diagnosing this properly is very important since an attempted resection of the bicornuate uterus, that is improperly diagnosed as a uterine septum might create a uterine perforation. Therefore the 3-D ultrasound or an MRI is strongly advised prior to any corrective surgery. The old-fashioned way of diagnosing the uterine septum by a hysterosalpingogram (HSG) only yields information about the cavity but not about the outer shape of the uterus. Therefore it is very important for the patient to have the proper imaging in place prior to making any decisions.
How is uterine septum diagnosed?
At the Tree of Life Center, we use a 3D vaginal ultrasound to determine the extent of the uterine anomaly and create a 3D picture of the uterine cavity. Our software allows us to rotate the virtual image of the uterus in any dimension so that all issues are clarified. The 3D ultrasound allows for three dimensional reconstruction of the uterine cavity with visualization that is superior to an HSG and can clearly identify the uterine septum. While a good sonographer might recognize a septum on 2D ultrasound, a detailed visualization and image post-processing can only work with a 3D ultrasound device. In comparison, the HSG fills out the cavity with contrast and utilizes low dose radiation. We see a lot of images taken in the wrong plane and the uterine shape can not be clearly seen on some studies. The HSG can not really adjust the plane and it mainly depends how your uterus lies in the abdomen. The 3D sonography can rotate the image using computer post-processing of the ultrasound data into the desired plane. Therefore, regardless how your uterus is positioned during the ultrasound acquisition, the correct plane can be adjusted. In addition to finding the right plane, the ultrasound will visualize the myometrium (the muscular layer that surrounds the cavity). This again allows us to see the uterine cavity and the entire uterus around it! The 3D sonography is therefore only comparable to a uterine MRI. However the MRI is very expensive and patients need to inject Gadolinium as a contrast medium and stay in the tube for a prolonged period of time. Some patients need to abort the MRI due to not tolerating the confined space or the IV contrast medium.We have included an image No.1 of a patient who was diagnosed with a uterine septum at our Tree of Life Center Los Angeles fertility clinic. We went ahead and did a surgical resection of the uterine septum and the image No.2 after surgery is included. A tiny residual where the septum was can still be seen, but the large indentation and Y-form cavity has been surgically corrected.
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