MS-0991

MS-0991

A 15-year-old male arrives at the emergency department with intense abdominal pain and a decreased Glasgow coma score (GCS). Over the past few weeks, he has been experiencing excessive urination, abnormal thirst, and weight loss. Laboratory results reveal:

Ketones 4.2 mmol/L (<0.6 mmol/L)
Glucose 20 mmol/L
pH 7.25

What is the probable cause of the acidosis and hyperketonemia in this case?