MRU without IV contrast may be useful in this setting in some clinical situations and can be combined with anatomical imaging to provide more information than anatomical imaging alone. Radiography Abdomen and Pelvis There is limited evidence to support the use of radiography of the abdomen and pelvis for initial imaging of pregnant patients with asymptomatic hydronephrosis with unknown cause. Radiography Intravenous Urography There is limited evidence to support the use of radiography with IVU (also referred to as IVP) for initial imaging of pregnant patients with asymptomatic hydronephrosis with unknown cause. Historically, IVP was used to evaluate hydronephrosis, but this study is considered obsolete in many settings [6]. US Abdomen There is relatively limited evidence to support the use of US of the abdomen for initial imaging of pregnant patients with asymptomatic hydronephrosis with unknown cause. It may be useful if there is clinical concern for specific causes identifiable by transabdominal US, although the gravid uterus may limit sonographic evaluation of abdominopelvic structures. US abdomen is a less comprehensive examination of the genitourinary system than MRU without IV contrast or US color Doppler kidneys and bladder retroperitoneal. Variant 5: Adult. Symptomatic hydronephrosis in a pregnant patient with unknown cause. Initial imaging. Please note that this variant describes initial imaging evaluation after the discovery, by imaging or otherwise, of symptomatic hydronephrosis in a pregnant patient with unknown cause. The choice of initial imaging in this situation is dependent on clinical context and on the information available from the means of hydronephrosis discovery (eg, CT, MR, US). CT Abdomen and Pelvis With IV Contrast There is limited evidence to support the use of CT abdomen and pelvis with IV contrast (separate from CTU) for initial imaging of pregnant patients with symptomatic hydronephrosis with unknown cause.
Hydronephrosis on Prior Imaging Unknown Cause. MRU without IV contrast may be useful in this setting in some clinical situations and can be combined with anatomical imaging to provide more information than anatomical imaging alone. Radiography Abdomen and Pelvis There is limited evidence to support the use of radiography of the abdomen and pelvis for initial imaging of pregnant patients with asymptomatic hydronephrosis with unknown cause. Radiography Intravenous Urography There is limited evidence to support the use of radiography with IVU (also referred to as IVP) for initial imaging of pregnant patients with asymptomatic hydronephrosis with unknown cause. Historically, IVP was used to evaluate hydronephrosis, but this study is considered obsolete in many settings [6]. US Abdomen There is relatively limited evidence to support the use of US of the abdomen for initial imaging of pregnant patients with asymptomatic hydronephrosis with unknown cause. It may be useful if there is clinical concern for specific causes identifiable by transabdominal US, although the gravid uterus may limit sonographic evaluation of abdominopelvic structures. US abdomen is a less comprehensive examination of the genitourinary system than MRU without IV contrast or US color Doppler kidneys and bladder retroperitoneal. Variant 5: Adult. Symptomatic hydronephrosis in a pregnant patient with unknown cause. Initial imaging. Please note that this variant describes initial imaging evaluation after the discovery, by imaging or otherwise, of symptomatic hydronephrosis in a pregnant patient with unknown cause. The choice of initial imaging in this situation is dependent on clinical context and on the information available from the means of hydronephrosis discovery (eg, CT, MR, US). CT Abdomen and Pelvis With IV Contrast There is limited evidence to support the use of CT abdomen and pelvis with IV contrast (separate from CTU) for initial imaging of pregnant patients with symptomatic hydronephrosis with unknown cause.