“…At present, the pathogenesis of MM is still unclear, and the nature of the tumor and reactivity have been controversial. [6,9,10] Its pathogenesis may include: chronic stimulation, such as pelvic inflammatory disease, endometriosis, and previous abdominal surgery, leads to reactive proliferation of mesenchymal cells [6,7,[11][12][13][14][15] ; the disease occurs mostly in young and middle-aged women, so it is speculated that sex hormones are caused by the disease [11] ; genetic factors. [16][17][18][19] Histologically, the mesenchymal cells lining cysts are varied in shape.…”