PAS does not stain:
Correct Answer: Lipids
Description: PAS Stain in used for glycogen and mucopolysaccharide containing structures. There are 2 type of PAS positivity (a) Diastase sensitive PAS+VE It occurs is I Ewing sarcoma II Primitive neuro ectodermal tumors III Glycogen storage disease IV Seminoma V Embryonal rhabdo myosarcoma (b) Diastase Resistant PAS +ve I alpha one antitrypsin Deficiency II alveolar soft pa sarcoma
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