Diagnostic dilemma: A woman's nausea was triggered by a huge mass in her stomach — which doctors dissolved with diet soda

A woman's abdominal discomfort turned out to be caused by a build up of food in her stomach. And the treatment involved diet soda.
Ars Technica

Woman hospitalized with pain and vomiting—a diet soda cured her

I'm confused but I don't want to sound pedantic or state the obvious. Perhaps it's due to a lack of familiarity with the metric system in the US, but why keep the technical-medical term "3,000 ...