Related Experiment Video
Updated: May 2, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
Congenital renal arteriovenous malformation presenting with gross hematuria after a routine jog: a case report
Erin L Dames1, Lay Guat Ng, Kiang Hiong Tay
1Department of Diagnostic Radiology, Singapore General Hospital, Outram Road, Singapore 169608, Singapore. erinleslee@gmail.com.
Introduction:
Congenital renal arteriovenous malformations are abnormal communications between the intrarenal venous and arterial systems. An unusual cause of massive gross hematuria and an even rarer cause of hemodynamically significant anemia, its presentation remains variable from incidental imaging findings to severe hypertension and congestive heart failure.
Case Presentation:
We present a case of a 44-year-old Chinese man with no personal or familial history of bleeding diasthesis that presented with gross hematuria leading to clot retention after routine physical activity.
Conclusions:
We have presented this case in an effort to highlight the possibility of this entity as a cause of acute upper urinary tract hemorrhage and the need for a computed tomography angiogram to clinch the diagnosis.
Related Concept Videos
Hemodialysis II: Procedure and Complications
Imaging Studies VII: Vascular Imaging
Acute Kidney Injury II: Pathophysiology
Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations
Acute Kidney Injury IV: Diagnostic Studies and Prevention

