Is nausea a symptom of neuroblastoma? What are other symptoms?

It can be-see below. Symptoms of neuroblastoma can vary (depending on where it's growing, where it spreads to, and metabolically active by-products), but can include abdominal fullness or distension, nausea/vomiting, abdominal pain, fatigue, bone pain, change in bowel or bladder habits, fevers, weight loss, decreased appetite, general malaise, irritability, fractures, high blood pressure, eyelid bruising, and others.
Possibly. Symptoms may include abdominal mass, bruising, malaise, pallor, pain (bone) with walking.