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: Pathology
Splenic macrophages in Gaucher's disease differ from those in ceroid histiocytosis by staining 
Select and explain. 
A. Lipids, B. Phospholipids, C. Acid Fast Stain, D. Iron
A: Lipids
Answer: A: Lipids 
Explanation: In Gaucher's disease there is an accumulation of Gaucher cells that Contain glucocerebroside which is a lipid (glycolipid)
In ceroid histocytosis, there is an accumulation of lipofuscin (ceroid), a yellow-brown cytoplasmic pigment, in the histiocytes.