29th April 2024

A 45-year-old man presents with acute onset of severe left flank pain radiating to the groin, accompanied by nausea and vomiting.

A 45-year-old man presents with acute onset of severe left flank pain radiating to the groin, accompanied by nausea and vomiting. He reports that the pain comes in waves and is intolerable. He denies any fever or urinary symptoms. His past medical history is unremarkable. On examination, he is restless and unable to find a comfortable position. His abdominal examination reveals tenderness in the left flank area. Urinalysis shows microscopic hematuria.

Which is the most likely diagnosis?