.
Dehydration and acidosis increase the risk for urinary stone formation. Urinary stones
have been reported in three pediatric cases of diabetic ketoacidosis (DKA). A 24-h urine
collection was performed for two of the three children. One patient had high urine sodium
levels, while the other had low urine citrate excretion. We report the case of a 12-yr-old
adolescent boy with urinary stones, new-onset type 1 diabetes mellitus (T1D), and DKA,
excluding other metabolic disorders. After DKA was diagnosed, the patient received a 0.9%
saline bolus and continuous insulin infusion. Hyperglycemia and ketoacidosis were
well-controlled on the third day after admission. However, the patient developed abdominal
pain radiating to the back. Urinary stones were suspected, and a urinalysis was performed.
The patient’s urine revealed significant elevation in red blood cells and calcium oxalate
crystals. Computed tomography revealed a high-density left ureteric mass, suggestive of a
urinary stone. Although both the previously reported pediatric cases involved metabolic
diseases, additional tests in this patient excluded metabolic diseases other than T1D. DKA
may be related to the formation of calcium oxalate crystals owing to dehydration and
acidosis. Therefore, physicians should consider urinary stone formation in DKA
patients.