Physiologic hydronephrosis as a cause of emergent right abdominal pain in pregnancy-truth or myth?

Background: Physiologic hydronephrosis in pregnancy is usually asymptomatic, however, definitions of symptomatic hydronephrosis vary, pain being the only criterion in some cases. We found no literature validating physiologic hydronephrosis as a cause of emergent right abdominal pain. We aimed to evaluate whether the incidence of hydronephrosis is higher in patients with right abdominal pain and no other identifiable cause, as compared to asymptomatic pregnant women (APW).