This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inborn Errors of Metabolism, Subject name: Pediatrics
All are metabolic causes of liver disease except: 
Select and explain. 
A. Histiocytosis, B. Hemochromatosis, C. Gaucher disease, D. Wilson disease
A: Histiocytosis
Answer: A: Histiocytosis 
Explanation: a. Histiocytosis(Ref: Ghai 9/e p 648)Metabolic causes of Liver disease:Carbohydrate disorders: Galactosemia, HFI, GSDAmino acid disorders: Tyrosinemia, Urea cycle defects, MSUDLipid disorders: Gaucher disease, Niemann-Pick disease, Wolman diseaseOthers: Zellweger syndrome, Wilson disease, alpha 1 AT deficiency, CF, Hemochromatosis Langerhans cell histiocytosis refers to reactive proliferation of dendritic cells