Adverse drug reactions are appreciably harmful or unpleasant reactions resulting from an intervention related to the use of medical products, which predicts hazard from future administration and warrants prevention or specific treatment, or alteration of the dosage regimen, or withdrawal of the product. Given medical case reports extracted from MEDLINE, the task is to classify whether the case report mentions the presence of any adverse drug reaction. Classify your answers into non-adverse drug event and adverse drug event.

The patient may have concomitant systemic disease, and the injury occurs with relatively mild trauma.
non-adverse drug event
The case report stated that the patient may have concomitant systemic disease, and the injury occurs with relatively mild trauma. It does not contain any evidence supporting the presence of adverse drug reaction. Therefore, it can be classified as non-adverse drug event..