If you haven’t yet had any experience with hemangiosarcoma, that is likely to change at some point during your career!
Unfortunately, unlike other forms of cancer that tend to creep up slowly, giving clients at least a short period of time to consider the possibilities and decide how to proceed, hemangiosarcoma often presents as an emergency.
If a dog comes in with a hemoabdomen due to a splenic tumor, you must consider hemangiosarcoma as a differential and be prepared to educate your clients within a relatively short period of time.