29th April 2024

A 58-year-old woman presents with painless gross hematuria that started two days ago.

A 58-year-old woman presents with painless gross hematuria that started two days ago. She denies any history of urinary tract infections or kidney stones. She has a 30-year history of smoking but is otherwise healthy. Physical examination is unremarkable, and urine analysis confirms the presence of red blood cells without any signs of infection.

Which is the most likely diagnosis?