Endometriosis mapping has moved beyond the question of whether disease is present. For patients with suspected ovarian and deep endometriosis, the clinical value lies in where the lesions are, how extensive they are, and whether they distort pelvic anatomy. Transvaginal ultrasound is well placed to answer these questions, provided the findings are reported in a structured way. The #Enzian system gives that structure. It translates ultrasound observations into a compartment-ba