Renal Colic Ureteric Stone Non-Contrast

A 38-year-old man presents to the emergency department with 6 hours of severe right flank pain radiating to the groin, accompanied by nausea, vomiting, and restlessness. He reports visible hematuria. On examination, he is afebrile with right costovertebral angle tenderness. Urinalysis shows microscopic hematuria without pyuria or nitrites. A non-contrast CT KUB is performed. The structure marked **A** in the diagram—a hyperdense calculus at the right vesicoureteric junction measuring 5 mm—is identified. Which of the following best describes the expected clinical course and initial management for this patient?