The efficiency of susceptibility-weighted MRI in the differentiation of endometriomas from haemorrhagic ovarian cysts

T2*-Weighted Imaging Performance in the Detection of Deep Endometriosis among Readers with Different Experience: Comparison with Conventional MRI Sequences

“…Some authors suggested that susceptibility-weighted imaging (SWI) can contribute to the diagnosis of endometriomas by revealing T2*W signal voids in the cyst wall [18,19]. Further studies confirmed these results, demonstrating that SWI can be effective in the differential diagnosis between endometriomas and haemorrhagic cysts [20]. Recent literature has also shown promising results for T2*W imaging in extra-ovarian endometriosis [13,21].…”

Multimodality imaging findings of infected endometriomas: “T1 signal reversal” as a potential diagnostic sign?

“…The vast majority of endometriomas (except fibrotic deep infiltrative endometriotic implants and those with acute bleeding) are T1 hyperintense [ 15 , 16 ]. However, some endometriomas might have a heterogeneous internal structure with T1 hypointense areas due to blood products of different stages [ 16 , 17 ]. In addition, malignant transformation and decidualization during pregnancy may present with intralesional T1 hypointense components, which necessitate the evaluation of dynamic postcontrast images with subtraction [6] .…”

“…In our case, a limited MRI protocol was used, and auxiliary diagnostic sequences for endometriomas, such as diffusion-weighted imaging (DWI) and susceptibility-weighted imaging (SWI), could not be obtained [ 6 , 17 ]. Therefore, it is a question mark how the conversion of blood to pus will be reflected in these sequences and how they can be used in the differential diagnosis.…”

Rapidly growing extensive polypoid endometriosis after gonadotropin-releasing hormone agonist discontinuation: A case report

“…The tumour, in this case, had a typical honeycomb shape, but due to the rarity of the disease and doctors’ inexperience, the possibility of the disease could not be considered before surgery. Normal endometriotic cysts have old haemorrhages in the cysts; thus, the cysts in the pelvic MRI showed a high signal on T1 weighted images (T1WI) and a low signal on T2 weighted images (T2WI)[ 18 ]. However, if PEM coexists with common endometriosis, typical endometriosis imaging features may appear, resulting in imaging features of polypoid lesions.…”