The reasons that are considered in the hamartomatous lesion can be listed as 1. Limited size 2. Lack of recurrence and 3. Metatstatic Mineralization. (1 and 2 are clinical parameters to evaluate and 3 is a histological parameter).
An AOT may sometimes be considered as a hamartoma although quite often so due to it's features. More usually an AOT presents with aggressive growth and thus considered a true tumor. The following articles may help-
http://journaldatabase.org/articles/adenomatoid_odontogenic_tumor_-.html
http://www.ncbi.nlm.nih.gov/pubmed/19325215
Regarding the controversy of this lesion,the debate has not been settled yet. is it a hamartoma or a benign neoplasm or a developmental anomalyor a cyst.
Howevere, immunohistochemical studies by certain authors reinforce the theory of hamartomatous character of this lesion indicating AOT is not a true neoplastic lesion.
the following reference may help you
Kurra S, Gunupati S, Prasad PR, Raju Y S, Reddy BVR. An Adenomatoid Odontogenic Cyst (AOC) with an Assorted Histoarchitecture: A Unique Entity. J. Clin. Diagn. Res. 2013;7(6):1232-5. doi:10.7860/JCDR/2013/5771.3089.
Vera Sempere FJ, Artes Martínez MJ, Vera Sirera B, Bonet Marco J. Follicular adenomatoid odontogenic tumor: immunihistochemical study. Med Oral Patol Oral Cir Bucal. 2006;11:E305–8.
Garg, D., Palaskar, S., Shetty, V. P., & Bhushan, A. Adenomatoid odontogenic tumor - hamartoma or true neoplasm: a case report., 51 Journal of oral science 155–159 (2009). doi:10.2334/josnusd.51.155
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