Understanding HWWS: A Rare Condition in Adolescents
In the world of medicine, there are conditions so rare that they often go unnoticed. One of these is Herlyn–Werner–Wunderlich syndrome (HWWS), an unusual but clinically significant anomaly that links the reproductive and urinary systems in an unexpected story of human development.
This case report was described by Osama Hazem Mahmoud Jabbarin, Ibrahim Kattoush, Ammar W.M. Hassouneh, Mohammed Alra’e, Sami Wahdan, Hisham ALBakri, and Amal Qudimat in the study “Herlyn–Werner–Wunderlich syndrome in an adolescent with epilepsy: Diagnostic and surgical challenges – first case report from Palestine”, from the Faculty of Medicine, Hebron University, Hebron, Palestine.
In HWWS, a double uterus appears, while one half of the vagina is blocked, and the kidney on the same side fails to develop altogether. Although this combination sounds dramatic, symptoms often remain hidden until adolescence, when menstruation begins. That is precisely when the problem starts. Blood that should normally flow out becomes trapped in the blocked half, creating pressure and pain. The result is severe, cyclical pain in the lower abdomen that recurs every month. In some patients, the pain becomes so intense that it interferes with daily life, school, and sleep.
In the described case, a 14-year-old girl suffered for months from increasingly severe pain associated with menstruation. At first, the symptoms were attributed to “normal” menstrual discomfort, which is not uncommon. However, as the pain became more pronounced, it was clear that something more serious was happening.
The key to solving such medical mysteries lies in imaging the body. Ultrasound was the first step, but it was not precise enough for complex anomalies. More advanced methods, such as CT and magnetic resonance imaging (MRI), were then used, revealing the full picture: a double uterus, a blocked right side of the vagina filled with accumulated blood, and the absence of the right kidney.
HWWS is estimated to occur in 0.1%–3.8% of patients with Müllerian anomalies
This combination of findings clearly points to HWWS syndrome, which arises due to a disturbance in the development of the so-called Müllerian ducts during pregnancy. These ducts normally form the female reproductive system, but if they fail to fuse or develop properly, rare anomalies like this can result. Although it sounds complex, treatment is often relatively simple and very effective. In this case, a surgical procedure was performed to remove the vaginal septum and allow normal menstrual outflow. The patient also had epilepsy, which required additional caution during the operation.
What this case particularly emphasizes is the importance of early recognition. If diagnosis is delayed, complications such as endometriosis, chronic infections, or even future fertility problems may arise. In other words, what begins as “ordinary painful menstruation” can hide a much more complex story.
“HWWS is a rare clinical presentation of Müllerian abnormalities. HWWS is estimated to occur in 0.1%–3.8% of patients with Müllerian anomalies and is typically diagnosed soon after menarche when obstructive symptoms begin. Early recognition is critical, as delayed diagnosis can lead to complications such as endometriosis, pelvic adhesions, infertility, and recurrent infections. It is still unclear what causes HWWS with urological abnormalities and how it develops,” the scientists explained in the study. As they conclude, HWWS, though rare, should be suspected in young females presenting with cyclical pelvic pain and renal anomalies. They emphasize that early diagnosis through imaging and surgical correction via septal excision and vaginoplasty ensures favorable reproductive and functional outcomes.
Image: Period pain treatment, Raising Children Network
