[Extrafollicular variant of centrally located adenomatoid odontogenic tumor].

An adenomatoid odontogenic tumor has been reported which was not connected with any impacted or displaced tooth. The clinical and radiographical results were consistent with a non-odontogenic cyst, but in this case the pathohistological examination revealed string-like and partly cross-linked cells of odontogenic epithelium as well as solid aggregates of epithelia, possessing gland-like structures at their centers. Furthermore, small deposits of PAS-positive materials could be seen which could be interpreted as non-mineralized dentine with a tubular basic structure. The therapy consisted of completely enucleating the tumor. Any recurrence of malignant degeneration has not yet been reported.