title: A Case of Bilateral Decidualized Endometriomas during Pregnancy: Radiologic-pathologic Correlation.
abstract: Clinical differentiation between decidualized endometrioma and malignant transformation still poses difficulties as both are intracystic vascularized excrescences of an endometrial cyst and exhibit similar characteristics on color-flow Doppler sonography. This is a characteristic sonographic finding associated with ovarian cancer, but MRI can provide further information about mural excrescences that can aid in their differential diagnosis; for example, the signal of decidualized endometriomas is isointense with the placenta within the uterus on all sequences and the apparent diffusion coefficient is higher than that of malignant mural nodules. Thus, MRI should be an aid in deciding whether to intervene during pregnancy. However, considering that it is not yet possible to clearly differentiate decidualized endometriomas from ovarian cancer, surgery or watchful observation may still be needed to exclude the possibility of malignancy.
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Go
authors.initials: G
authors.lastname: Nakai
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Remi
authors.initials: R
authors.lastname: Kitano
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Natsuko
authors.initials: N
authors.lastname: Yoshimizu
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Kiyohito
authors.initials: K
authors.lastname: Yamamoto
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Higashiyama
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Juri
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nakamoto
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Yamamoto
authors.affiliation: Department of Pathology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamada
authors.affiliation: Department of Pathology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Hirose
authors.affiliation: Department of Obstetrics and Gynecology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Masahide
authors.initials: M
authors.lastname: Ohmichi
authors.affiliation: Department of Radiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Narumi
mesh_terms: D000328:Adult; D003656:Decidua / Q000000981:diagnostic imaging / Q000473:pathology; D003937:Diagnosis, Differential; D004715:Endometriosis / Q000150:complications* / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D010051:Ovarian Neoplasms / Q000150:complications / Q000175:diagnosis; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011252:Pregnancy Complications, Neoplastic / Q000175:diagnosis; D011859:Radiography; D018615:Ultrasonography, Doppler, Color
keywords: Decidualized endometrioma; MR finding; apparent diffusion coefficient; diffusion-weighted imaging