Severe Pediatric Diabetic Ketoacidosis Complicated by Dialysis-Requiring Acute Tubular Injury, in a Child Newly Diagnosed with Type 1 Diabetes Mellitus: A Case Report.

Background and Clinical Significance: Diabetic ketoacidosis (DKA) is a common presentation of new-onset type 1 diabetes mellitus in children; however, severe DKA complicated by acute pancreatitis, dialysis-requiring acute kidney injury (AKI), severe hypertension, and neurological involvement is uncommon. Early recognition of these complications is essential because they may substantially increase morbidity and complicate standard DKA management; Case Presentation: An 11-year-old Saudi girl with morbid obesity (BMI 43 kg/m2), previously in good health, was brought to the emergency department after being found semi-conscious. She had experienced intermittent abdominal pain for five weeks and vomiting for four days. On presentation, she was critically ill, dehydrated, and confused (Glasgow Coma Scale 11/15) and exhibited Kussmaul breathing and abdominal tenderness. Laboratory investigations confirmed severe new-onset DKA, with a blood glucose level of 684 mg/dL, pH < 7.0, HbA1c 12.2% and an anion gap > 37 mEq/L. Despite standard DKA management, metabolic acidosis persisted and renal function progressively deteriorated, accompanied by oliguria and severe hypertension reaching 200 mmHg. By day 4, the patient developed anuria and marked creatinine elevation to 560 µmol/L. Brain magnetic resonance imaging demonstrated cerebral microhemorrhages in the setting of multifactorial encephalopathy. Continuous kidney replacement therapy was initiated for KDIGO stage 3 AKI with refractory metabolic acidosis. Autoimmune testing supported the diagnosis of type 1 diabetes mellitus, while renal biopsy demonstrated acute tubular injury; Conclusions: This case highlights a rare, severe multisystem presentation of pediatric DKA. Close monitoring for renal, neurological, pancreatic, and hypertensive complications is crucial, particularly when the clinical course does not improve as expected with standard therapy.