When we talk about endometriosis, we typically picture tissue similar to the uterine lining growing within the pelvic cavity. But what happens when this tissue appears on the body’s largest organ—the skin? This rare condition, known as cutaneous endometriosis, can be confusing and distressing, but it is very real and treatable.
At Endometriosis Surgical Specialists International (ESSI), we believe in empowering patients with knowledge. Understanding this uncommon presentation of endometriosis is the first step toward finding the right solution.
What is Skin Endometriosis?
Cutaneous endometriosis occurs when endometrial-like glands and stroma implant and grow in the layers of the skin. It most often appears in or near surgical scars, particularly from Cesarean sections or laparoscopies, and is called “iatrogenic” or secondary endometriosis. Less commonly, it can appear spontaneously without a prior surgery, often in or around the umbilicus (belly button).
The presence of this tissue on the skin is not just a simple lump; it is hormonally active, just like pelvic endometriosis.
Recognizing the Cyclical Signs
The most telling sign of skin endometriosis is its cyclical nature. Patients often report a skin nodule or lesion that changes in sync with their menstrual cycle. Key symptoms include:
- A Palpable Lump: A firm nodule that can be felt under or on the skin, ranging in size from a few millimeters to several centimeters ( 5 cm in some cases).
- Cyclical Pain: The lesion becomes tender, swollen, and painful in the days leading up to and during menstruation.
- Color Changes: The nodule may take on a reddish, brown, or bluish-black appearance as it fills with blood.
- Cyclical Bleeding: In some cases, the lesion may actually bleed during the menstrual period.
If you have a lump on a C-section scar that becomes painful every month, it is crucial to have it evaluated by a specialist.
Diagnosis and the Gold Standard Treatment
While a doctor may suspect cutaneous endometriosis based on your history and a physical exam, the definitive diagnosis is made through a biopsy. Examining the tissue under a microscope (histopathology) confirms the presence of endometrial cells.
The most effective treatment for skin endometriosis is complete surgical excision. This involves carefully removing the entire lesion along with a small margin of surrounding healthy tissue to ensure no abnormal cells are left behind. This procedure, when performed by a skilled surgeon, is curative and has a very low rate of recurrence.
At ESSI, our patient-centric and multidisciplinary approach ensures that every aspect of your condition is addressed. While skin endometriosis is uncommon, it is not unheard of to our specialists. Your concerns are valid, and our team has the surgical expertise to provide the definitive care you deserve.
