"type 1: heterogeneous solid mass located in the uterine cavity, with minimal to a moderate degree of vascularisation on colour Doppler imaging"
"type 2: heterogeneous solid mass within the myometrium (invasion ≥50% of its thickness), with minimal to a high degree of vascularisation on colour Doppler imaging"
"type 3: cystic lesions within the myometrium, with a high degree of vascularisation (lacunar-type lesions), indicating an arterio-venous shunt"
"T1: typically isointense compared with healthy myometrium"
"T2: isointense to slightly hyperintense compared with myometrium"
"It was first described by R J Kurman et al. in 1976 as a "trophoblastic pseudo-tumour". The term "placental site trophoblastic tumour" was later coined by R E Scully and R H Young in 1981 5."
"A placental site trophoblastic tumour may present as a heterogenous endometrial and myometrial mass although appearances on MRI can be non-specific. The junctional zone is disrupted. In the majority of cases, there are cystic spaces and vascular structures."
"in contrast to other forms of gestational trophoblastic disease, placental site trophoblastic tumours produce small amounts of ß-human chorionic gonadotropin; this is thought to be due to the relative lack of syncytiotrophoblastic tissue within the tumour"