Revise Radiology Breast & OG Flashcards
MRI limitations in ovarian tumours
Less useful than CT to assess for metastatic disease
Complication of large CPAM prenatally
Hydrops fetalis
Bilateral, sharply marginated oval tumours preserving ovarian contours
Krukenberg tumours
Ectopic pregnancy vs corpus luteum cyst
Both ring of fire
Ectopic: RI <0.4 or >0.7, thick echogenic ring, moves away from ovary
Benign microcaclification
Stable for 2 years
O-RADS 3
5-10cm
Homogenous low level internal echos
no solid components or doppler flow
Thick membrane separating 2 gestational sacs
Dizygotic dichorionic diamniotic
MRI contrast in pregnancy
Gd based contrast crosses the placenta membrane and circulates through amniotic fluid
cervical cancer causing hydronephrosis
Suggests pelvic sidewall invasion, T3b
T2 bright multilocular cystic mass in ovary, no solid components
Cystadenoma
Mucinous vs serous cystadenoma of ovaries
Mucinous are larger and more often multiloculated with fewer papillary projections
FDG positive result (adrenal)
Adrenal lesion > liver
Chemical shift MRI for adrenal lesions
> 40% decrease suggests benign (adenoma)
<20% suggests malignancy
Accoustic shadowing suggests (breast)
Malignancy
O-RADS 2
<10cm
Smooth walls
No septations, solid components or doppler