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
Oncocytes are seen in all of the following except- 
Select and explain. 
A. Pitutary, B. Thyroid, C. Pancreas, D. Thymus
D: Thymus
Answer: D: Thymus 
Explanation: Ans. is 'd' i.e., ThymusOncocytes are cells with marked cytoplasmic eosinophilia and granularity.There is a great increase in the number of mitochondria which is typical of oncocytes morphology.Oncocytes are present in the acini and ducts of normal salivary gland.o They are also present in some benign tumors of salivary glands, thyroid, parathyroid, kidney, lung and pituitary - Ackerman. o It is also seen in oncocytic carcinoma. - Ackerman