A 34 year old man presents with fever and confusion for 4 days. No other symptoms were seen.
He was diagnosed with schizophrenia a month ago, and started on olanzapine soon afterwards. His medical and surgical histories are otherwise unremarkable.
A complete blood count is significant for a WBC of 12,000/mm3 (normal: < 11,000), with 65% neutrophils and 34% lymphocytes.
A random capillary glucose and liver profile are within normal parameters.