Painless Microscopic Hematuria

An early diagnosis of antibody-associated vasculitis may be important to long-term kidney function, study data show, as even mild forms of kidney involvement can affect prognosis.

A 55-year-old man new to the area presents to the ED complaining of excruciating left flank pain that radiates into his scrotum. He noted blood in the urine this morning and became worried enough to seek emergency care.