This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Childhood malignancies, Subject name: Pediatrics
All of the following are true about neuroblastoma except? 
Select and explain. 
A. Diarrhea, B. Bone pain, C. Cafe-au-lait spots, D. Opsomyoclonus
C: Cafe-au-lait spots
Answer: C: Cafe-au-lait spots 
Explanation: Cafe au lait spots are associated with neurofibromatosis.