title: Prenatal diagnosis of congenital mesoblastic nephroma in mid-second trimester by sonography and magnetic resonance imaging.
abstract: Although congenital mesoblastic nephroma (CMN) is a rare benign congenital renal tumor, it is the most common solid renal tumor in the newborn period. The most common presentation of congenital mesoblastic nephroma is polyhydramnios, and only one case with prenatal fetal hydrops has been previously reported. Prenatal diagnosis of CMN has previously been made on the basis of the findings of sonography in the third trimester, and magnetic resonance imaging (MRI)-based diagnosis has been reported recently. Here we report a case of prenatally diagnosed classical type CMN diagnosed at 22 + 3 weeks of gestation based on the findings of sonography and magnetic resonance imaging. The characteristic imaging findings in this case were fetal hydrops and polyhydramnios. To our knowledge, this is the youngest reported gestational age for prenatal diagnosis of CMN and it is the second case of CMN associated with fetal hydrops detected prenatally.
authors.affiliation: Department of Obstetrics and Gynecology, Chi-Mei Medical Center, Tainan City, Taiwan, Republic of China.
authors.forename: Wen-Yin
authors.initials: WY
authors.lastname: Chen
authors.forename: Ching-Nan
authors.initials: CN
authors.lastname: Lin
authors.forename: Chien-Shun
authors.initials: CS
authors.lastname: Chao
authors.forename: Mike
authors.initials: M
authors.lastname: Yan-Sheng Lin
authors.forename: Chee-Wai
authors.initials: CW
authors.lastname: Mak
authors.forename: Shih-Sung
authors.initials: SS
authors.lastname: Chuang
authors.forename: Ching-Cherng
authors.initials: CC
authors.lastname: Tzeng
authors.forename: Kuo-Feng
authors.initials: KF
authors.lastname: Huang
mesh_terms: D000328:Adult; D017809:Fatal Outcome; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D015160:Hydrops Fetalis / Q000000981:diagnostic imaging / Q000209:etiology; D007231:Infant, Newborn; D007234:Infant, Premature; D007680:Kidney Neoplasms / Q000150:complications / Q000151:congenital / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging; D008297:Male; D018201:Nephroma, Mesoblastic / Q000150:complications / Q000151:congenital / Q000000981:diagnostic imaging*; D007752:Obstetric Labor, Premature; D006831:Polyhydramnios / Q000000981:diagnostic imaging / Q000209:etiology; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal