Fig. 1

PMs presented with more cellularity, sex steroid receptors, proliferative property and angiogenesis expressions compared with UMs. a The imaging study of magnetic resonance imaging (MRI). (Left) one PM (white arrow) located at the level between peritoneum and fascia transversalis at right lower abdominal wall and another PM (yellow arrow) located at left lower abdominal wall on post-Gadolinium T1 weighted image. (Right) one UM (yellow arrow) located at left uterine wall on post-Gadolinium image. b Resection of PMs. (Left) One PM, 5*4 cm, (yellow arrow) located at previous trocar site; (Right) one 2*2 cm PM (white arrow) at sub-umbilicus for laparoscopy. c Staining for H&E, and IHC for ERα, PR, SMA, Ki67, vimentin, VEGF and CD34. Original magnification: ×400; the scale bars represent 400 μm. UM = uterine myoma, PM = parasitic myoma, ERα = oestrogen receptor α, PR = progesterone receptor, SMA = smooth muscle actin, VEGF = vascular epithelial growth factor