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: Orthopaedics
Most common site of origin of adamantinoma is - 
Select and explain. 
A. Mandible near molar tooth, B. Middle alveolar margins, C. Hard palate, D. Mandible near symphisis menti
A: Mandible near molar tooth
Answer: A: Mandible near molar tooth 
Explanation: Ameloblastoma occurs most often in the mandible in the area of the molars.
It is an epithelial tumor arising from ameloblast (enamel-forming cells).
Pathologically it behaves like a basal cell carcinoma i.e., it is a malignant tumour which is locally invasive but does not metastasize.
It causes expansion mostly of the outer table so the swelling is more evident from outside than from inside of the mouth.
Cystic degeneration leads to an area of softening and egg - shell crackling on palpation.