This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
A patient admitted with abdominal mass underwent MRI. and it revealed B/L adrenal calcification. Diagnosis? 
Select and explain. 
A. Pheochromocytoma, B. Adrenal incidentalma, C. Neuroblastoma, D. Medullary thyroid cancer
C: Neuroblastoma
Answer: C: Neuroblastoma 
Explanation: Neuroblastoma is characterized by abdomonal mass that often crosses midline and it shows stippled calcification on MRI.