In contrast to a uterus during labor, a quiescent uterus has thick myometrium
whose lower segment is relatively high and thick because of a lack of contractions, and cutting into the lower segment might cause more bleeding as well as difficulty in suturing.
Grade IV- Bulky myometrium
junctional zone interface > 10 mm.
Scar pregnancies with minimal or absent overlying myometrium
are typically diagnosed in the first trimester and carry increased risk of hemorrhage and uterine rupture.
However, no myometrium
was seen on the US around the sac, and high risk of uterine rupture was considered.
An ectopic pregnancy embedded in the myometrium
of a previous cesarean section scar.
Ultrasonography of the abdomen showed a 10x10 cmuniloculated mass with regular borders in the myometrium
Preoperative magnetic resonance imaging (MRI) scan (A) shows 7 fibroids in a 22-week-sized uterus, and 6-month postoperative MRI scan (B) shows a normal-sized uterus with excellent healing of the myometrium
Supporting this finding, a polymorphism of the MMP-1 gene affecting collagen remodeling in the myometrium
was suggested to be a potential risk factor for developing leiomyoma in a Russian population .
A TVS showed an avascular area of mixed echogenicity measuring 61 x 43 x 54mm in the lower anterior myometrium
at the level of the previous caesarean scar.
Another benefit of SIS over TVUS and hysterosalpingogram is that one can measure the thickness of the remaining myometrium
overlying the isthmocele, which is especially important knowledge for patients considering another pregnancy.
It emphasizes the morphologic features and immunohistochemistry of biopsies of the cervix, endometrium, and myometrium
, as well as differential diagnosis and benign mimics of tumors.
Tissue sections were then immunofluorescently stained to detect PGRAB followed by image analysis to determine intensity of staining in selected utero-placental compartments including luminal epithelium (LE), endometrial glands (EG), endometrial stroma (ES), endometrial blood vessels (EBV), myometrium
(MYO), myometrial blood vessels (MBV), and fetal membranes (FM, fetal placental tissues).