When a Stomachache Becomes a Race Against Time: One Family's Fight With an Unknown Killer

A family vacation turned into a nightmare when five-year-old Justin Vu developed what seemed like routine stomach trouble. But what began as nausea and vomiting during a Pacific Northwest trip from Colorado quickly spiraled into something far more sinister—a medical condition so rare that fewer than 500 cases have ever been documented worldwide.

Justin died on July 8 at Randall Children’s Hospital in Portland, just five days after his symptoms started. The culprit: systemic capillary leak syndrome, also known as Clarkson’s disease. His mother, Terese Peden, watched helplessly as doctors scrambled to identify what was ravaging her son’s body. After two days in the hospital, he was placed on life support, and physicians delivered the grim calculus that no parent wants to hear—a 50/50 chance of survival.

What makes Clarkson’s disease so deadly is its brutality and its mystery. The condition causes plasma to suddenly leak from blood vessels into surrounding tissues, triggering a catastrophic cascade: blood pressure plummets, organs fail, and death follows. There is no cure. The cause remains unknown. The Cleveland Clinic notes that without prompt treatment, the outcome is almost always fatal. Justin’s doctors tried everything they could, but his body was simply shutting down faster than medicine could intervene.

This isn’t a story about a rare disease that deserves a footnote in medical journals. It’s a reminder that sometimes illness strikes without warning, without pattern, without mercy. Justin’s father, Viet Vu, has channeled his family’s unimaginable grief into purpose, saying on Facebook that if his son’s story can help even one person, it would bring meaning to the loss.

Justin was only five years old. His family’s push to raise awareness about Clarkson’s disease is now the only thing left they can control—a way to ensure that his name, and what happened to him, isn’t forgotten.