An Unrecognized Cause of Elevated Procalcitonin Level.

Diabetic Ketoacidosis (DKA) is a preventable yet serious complication of diabetes that is commonly associated with type 1 diabetes but can also occur in other forms of diabetes, including type 2. Infection is a primary cause of DKA and can lead to elevated levels of procalcitonin (PCT), which is a biomarker used to differentiate bacterial infections from non-infectious inflammation. However, some cases of DKA have shown increased PCT levels even in the absence of bacterial infection, and the underlying mechanism of this observation is not fully understood. To gain a better understanding of how non-infectious inflammation affects PCT levels, further research is needed. While PCT is a helpful biomarker, it should be interpreted in the context of the patient's overall clinical picture, including signs and symptoms of infection or inflammation and underlying medical conditions that may be contributing to their presentation. A systematic approach to evaluating and managing patients with DKA can minimize the risk of unnecessary antibiotic use and ensure optimal treatment. We present a 31-year-old male who was admitted to the ICU with DKA, and further investigations revealed elevated PCT levels. Despite conducting several studies and cultures, including blood and urine, no infections were detected. The patient was treated for DKA with hydration and insulin administration without the use of antibiotics, and his PCT levels subsequently decreased.