Fig. 10From: Acute abdominal pain in women of reproductive age: keys to suggest a complication of endometriosis41-year-old female presenting with acute left lumbar region pain. No history of endometriosis. CT (a, b) shows a left hydronephrosis (star) and dilated ureter (arrow), up to a retractile mass located at the level of the ovarian fossa (dotted circle). T2W MRI (c, d) shows a stellar periureteral mass (dotted circle) responsible for obstruction (arrow). Nephrectomy was performed because of the complete loss of left kidney function, confirming the diagnosis of left ovarian and parametrial endometriosis, responsible for an extrinsic obstruction of the ureterBack to article page