Final answer:
If an ultrasound of the liver shows a solid appearing lesion and the RBC scan is negative for hemangioma, the next step would be to further investigate the lesion.
Step-by-step explanation:
If an ultrasound of the liver shows a solid appearing lesion and the RBC scan is negative for hemangioma, the next step would be to further investigate the lesion. Additional imaging tests, such as a CT scan, may be done to obtain more detailed images of the liver and determine the nature of the lesion. Liver enzymes and other blood tests may also be performed to rule out other potential causes.