Final answer:
Fat embolism can indeed present without a petechial rash, as this is just one of the possible symptoms of fat embolism syndrome.
Step-by-step explanation:
True, fat embolism can present without the petechial rash. While petechiae are a common clinical sign of fat embolism syndrome (FES), their absence does not rule out the condition. FES typically presents with a classic triad of symptoms including respiratory distress, neurological abnormalities, and a petechial rash. However, it is possible to have an FES without all three manifestations, and the diagnosis can be based on other criteria such as imaging results and lab findings. It is important for medical providers to consider the entire clinical picture when evaluating for FES, especially following trauma or orthopedic surgery which are common precipitating events.