Introduction
An ideal classification system should meet three core principles: it
should be simple, allow description of the disease and correlate with
clinical findings (1). Currently, the two most used classifications
systems for endometriosis are the rASRM (2) and Enzian (3), of which
neither shows strong clinical correlation with pain symptoms (4, 5).
This could be explained by the fact that the rASRM is not directly
suitable to describe deep endometriosis (6). On the other hand, the
Enzian classification is not able to describe the tubes, ovaries and
peritoneum which is covered by the rASRM classification. An attempt to
overcome these difficulties has recently been made by theStiftung Endometriose Forschung (SEF) at their annual Weisensee
endometriosis meeting, during which an update of the Enzian
classification was created: the #Enzian (7).