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Updated: Aug 11, 2026

Assessment of Maternal Vascular Remodeling During Pregnancy in the Mouse Uterus
Published on: December 5, 2015
Aggravation of the nutcracker syndrome during pregnancy
S Itoh1, K Yoshida, Y Nakamura
1Department of Obstetrics and Gynecology, Faculty of Medicine, Juntendo University, Tokyo, Japan.
Background:
The nutcracker syndrome is a rare condition thought to be caused by compression of the left renal vein between the descending aorta and the superior mesenteric artery.
Case:
Gross hematuria appeared in the third trimester of an otherwise normal pregnancy. It continued despite treatment, and a cesarean was performed at 37 weeks' gestation. The hematuria stopped postpartum. With postpartum angiography and three-dimensional computed tomography, the diagnosis of nutcracker syndrome was finally made.
Conclusion:
Pregnancy can aggravate the nutcracker syndrome. This syndrome should be recognized as one of the diseases that causes gross hematuria.
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