Plasma free metanephrines
Urinary fractionated metanephrines
CT imaging to localize tumor
General lab features include hyperglycemia, hypercalcemia, and erythrocytosis
Pheochromocytoma
Hypertensive emergency
Wilms' tumor
Stroke
Neuroblastoma 
Sympathetic crashing acute pulmonary edema
Syndrome of inappropriate antidiuretic hormone secretion
Ischemic stroke