Wunderlich syndrome is a rare condition in which spontaneous non-traumatic renal hemorrhage occurs into the subcapsular and perirenal spaces. It is clinically characterized by Lenk's triad; acute flank pain, flank mass, and hypovolemic shock.

It may be secondary to neoplastic or non-neoplastic causes. Among benign neoplasms, angiomyolipoma is the commonest, while among malignancies, renal cell carcinoma is the commonest.

After resuscitation, this patient was transferred for emergency embolization.

Ultrasound contribution by Dr. Somia Elbadawy