Rhabdomyolysis is an uncommon but underestimated complication of HONK. 1 We present the case of a patient presenting with HONK complicated by rhabdomyolysis.
CASE HISTORYA 75-year-old man of Asian origin was admitted with a 2-day history of being generally unwell. He noted progressive polyuria, polydipsia for about 2 months prior to admission. There was no history of trauma, seizures, muscle pain, chest pain, drug or alcohol abuse. He had no past medical history including no known diabetes mellitus. He was a non-smoker and did not drink alcohol.On admission his blood pressure was 150/90, pulse rate 110/minute regular, temperature 368C. Physical examination was only remarkable for dehydration. Laboratory investigations on admission revealed venous plasma glucose 42 mmol/L; sodium 152 mmol/L; potassium 4.4 mmol/ L; urea 13.4 mmol/L; creatine 147 mmol/L; arterial blood gas ph 7.36, HCO 3 23.9 mmol/L; serum osmolality 362 mOsm/kg; serum creatine kinase 6309 iu/L with CKMB fraction of 0.9%; troponin I 50.1 ng/L; albumin 50 g/L; bilirubin 12 mmol/L; alanine transferase 60 iu/L; alkaline phosphatase 127 iu/L; serum amylase 75 iu/L; haemoglobin 16.8 g/L; leucocytes 17610 9 platelets 267610 9 ; C-reactive protein 8 mg/L; erythrocyte sedimentation rate 16 mm in the first hour; urine dipstix revealed 4+ glucose; the chest X-ray and electrocardiograph were unremarkable.The patient was treated with rehydration and continuous insulin infusion for 48 h. The creatine kinase rose from 6309 iu/L on admission to a peak level of 11 275 iu/L on day 2 before reducing to 3292 iu/L on day 3. By day 3 his sodium had normalized to 137 mmol/L and creatine to 74 mmol/L. Blood and urine cultures were negative. The patient was feeling much better by day 2 when he was put on a twice-daily insulin regime. Due to important commitments at home the patient had to be discharged on day 3.