YCYongen Chang

1. Article · Aug 20, 2026 · Yongen Chang, MD, PhD

   Clinical Quiz: IgA Nephropathy With Frequent Hematuria - Renal and Urology News (opens the original)

   Excerpt · English

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   A 22-year-old man of Japanese descent who recently moved to the area for work visited a nephrology clinic to establish care. He was diagnosed with IgA nephropathy on kidney biopsy at age 16 years after experiencing recurrent gross hematuria, typically associated with an upper respiratory illness. Initial biopsy at that time showed mild to moderate mesangial expansion and predominant IgA staining in the mesangial area. There was minimal interstitial fibrosis and tubular atrophy. MEST-C score was

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2. Article · Jul 23, 2026 · Yongen Chang, MD, PhD, Shubham Dixit, DO

   Clinical Quiz: How Would You Treat Blunt Abdominal Trauma? - Renal and Urology News (opens the original)

   Excerpt · Critical tone · English

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   A 65-year-old woman with diabetes mellitus and hypertension was brought to the emergency department as a trauma activation following a high-speed motor vehicle collision. She presented with hypotension and signs of blunt abdominal trauma. Her blood pressure on arrival was 90/50 mmHg. Her urine was grossly bloody. CT angiography of the abdomen and pelvis demonstrated traumatic hemoperitoneum, multiple rib fractures, hemothorax, pneumomediastinum, small bowel mesenteric injury, and a grade 4 left

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