A COMPREHENSIVE DIAGNOSTIC AND TREATMENT APPROACH TO ACUTE RIGHT-SIDED FLANK PAIN WITH HEMATURIA IN A REPRODUCTIVE-AGE FEMALE: A CASE OF URETERAL NEPHROLITHIASIS Case Introduction Molly Howard is a 33-year-old female who presents to the outpatient clinic with a chief complaint of acute right-sided flank pain. The pain began suddenly earlier today and has progressively worsened. She describes the pain as sharp and severe, radiating from the right flank toward the lower abdomen and groin. The patient reports associated nausea, one episode of vomiting, urinary urgency, dysuria, and visible blood in her urine. She denies fever, chills, vaginalbleeding, or recent trauma. Her presentation raises concern for a genitourinary etiology requiring further diagnostic evaluation. Abstract Acute flank pain is a common presenting complaint in outpatient and emergency settings and requires prompt evaluation to differentiate between urologic, gastrointestinal, and gynecologic etiologies. This case presents a 33-year-old reproductive-age female with sudden-onset right-sided flank pain radiating to the groin, accompanied by hematuria, dysuria, nausea, and vomiting. A comprehensive diagnostic approach was utilized, including detailed history, physical examination, laboratory testing, and imaging studies. Urinalysis revealed significant hematuria without evidence of infection, and non-contrast computed tomography of the abdomen and pelvis identified a 4 mm right ureteral