If you experience a swollen navel, discharge, and severe pain every time you menstruate, are you perhaps dismissing it as just a simple navel inflammation? A case has been reported in the UK where a woman in her 30s suffered from these symptoms for a staggering two years before finally being diagnosed with a rare condition called 'umbilical endometriosis,' drawing significant attention. Today, we'll delve into this remarkable case and learn more about umbilical endometriosis.

Navel Pain Every Period? It Might Not Be Simple Inflammation!

A woman in her 30s in the UK experienced a swollen navel, discharge, and excruciating pain in sync with her menstrual cycle. Initially, she was diagnosed with a simple navel infection or granuloma at a local clinic and treated with antifungal and antibiotic ointments for two years, but her symptoms showed no improvement. Especially over the past year, the crushing pain in her navel intensified with her menstrual cycle, making daily life incredibly difficult.

Eventually, this woman sought care at a university hospital, where she received a surprising diagnosis after thorough examinations. The research team discovered a purplish-brown nodule (lesion) approximately 15mm in diameter in the patient's navel, and cell tissue examination clearly confirmed characteristics unique to endometrial tissue within the nodule. Despite having no history of abdominal or gynecological surgery, she was definitively diagnosed with 'primary cutaneous endometriosis.' Although this woman had already been suffering from a right ovarian endometrioma and long-term dysmenorrhea, no one had anticipated that endometriosis could develop in her navel.

Umbilical Endometriosis: Why Does It Occur, and Why Is It Difficult to Diagnose?

Endometriosis is a condition where endometrial tissue, which should normally be inside the uterus, grows outside of it. While it's primarily found within the pelvis, 'umbilical endometriosis,' occurring in the navel, is extremely rare, accounting for only about 0.5-1% of all extrapelvic endometriosis cases. So, why does endometrial tissue develop in the navel?

• Migration of Endometrial Cells: When endometrial cells spread to the navel via lymphatic vessels or blood vessels.
• Retrograde Menstruation: When menstrual blood flows backward and implants within the peritoneum, indirectly affecting the navel.
• Metaplastic Transformation of Local Tissue: When tissue in a specific area transforms into endometrial tissue.

Due to these complex mechanisms of development, diagnosis is not easy. Furthermore, umbilical endometriosis closely resembles common conditions such as umbilical granuloma, epidermal cysts, and umbilical hernia, as well as malignant tumors where internal organ cancer cells have metastasized to the navel (Sister Mary Joseph's nodule). This means it's often misdiagnosed or diagnosed late. As a result, many patients endure unnecessary suffering.

If Symptoms Recur with Your Menstrual Cycle, Head Straight to a Gynecologist!

Umbilical endometriosis is rare, but there's a crucial clue that can raise suspicion. This is the recurring pattern of symptoms worsening in sync with the menstrual cycle and then subsiding once menstruation ends. If you are a woman of reproductive age and experience a swollen navel, a lump, pain, or discharge that intensifies around the start of your period, you should strongly suspect umbilical endometriosis and seek immediate gynecological consultation.

Regarding treatment, it is known that medication or hormone therapy has a low efficacy in completely curing the skin lesion itself. Therefore, experts state that to reduce recurrence rates and prevent any potential risk of malignant transformation, widely excising the lesion and surrounding peritoneum, followed by navel reconstruction surgery, is the most effective approach.

Your Questions Answered! Umbilical Endometriosis Q&A

We've compiled some questions about umbilical endometriosis that our readers might be curious about.

• Q1. If a lump appears in the navel and it hurts, is it always umbilical endometriosis?
  A1. No, not necessarily. Symptoms such as a lump, pain, or discharge in the navel are much more likely to be caused by other conditions like simple navel inflammation, granuloma, epidermal cysts, or umbilical hernia. However, if you are a woman of reproductive age and these symptoms show a pattern of periodically worsening in sync with your menstrual cycle, umbilical endometriosis should be strongly suspected.
• Q2. Can I get this condition even if I haven't had any previous abdominal or gynecological surgery?
  A2. Yes, you can. While endometriosis often occurs at surgical scar sites, 'primary' umbilical endometriosis can also occur in women with absolutely no history of previous surgery, as seen in this case. This can happen due to reasons such as endometrial cells migrating and implanting via blood vessels or lymphatic vessels.
• Q3. Is umbilical endometriosis untreatable with hormones or ointments?
  A3. While medication or hormone therapy can alleviate some symptoms, their effectiveness in completely treating the skin lesion itself is low. Therefore, for complete cure, prevention of recurrence, and to mitigate the risk of progression to cancer, extensive excision of the lesion including the surrounding peritoneum, followed by navel reconstruction surgery, is the most desirable treatment.

Umbilical endometriosis is rare, but it is a condition that can significantly impact a woman's quality of life. If you are experiencing any of the symptoms mentioned above, do not hesitate to consult with a specialist for an accurate diagnosis. After all, it's always important to safeguard your health proactively!