Abstract
Endometriosis is a benign estrogen-dependent disorder affecting women in their reproductive age group. Endometriosis means 'abnormal growth of endometrial glands' outside the uterus. Multiple theories on aetiopathogenesis of endometriosis have been postulated, Halban's theory on 'Benign Metastasis' which proposed the presence of endometriotic cells in lymphatic vessels and lymph nodes provides the basis of this case report. Here, we report a case of 26-year-old nulliparous woman who presented with grossly elevated CA 125 with endometriosis in her para-aortic nodes mimicking as ovarian cancer.