A Case of Wunderlich Syndrome Caused by Pyelonephritis Due to Klebsiella pneumoniae

Wunderlich syndrome, characterized by spontaneous nontraumatic renal hemorrhage, is a rare but severe condition often presenting with Lenk's triad: acute abdominal pain, flank mass, and hypovolemic shock. While typically caused by neoplastic or vascular conditions, infection-induced Wunderlich syndrome is uncommon. This case report details an 80-year-old woman who developed Wunderlich syndrome secondary to pyelonephritis caused by