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Oral Surg Oral Med Oral Pathol Oral Radiol. 2014 Jul;118(1):e12-8. doi: 10.1016/j.oooo.2013.08.032. Epub 2013 Nov 23.

Hybrid ameloblastoma and adenomatoid odontogenic tumor: report of a case and review of hybrid variations in the literature.

Author information

1
Assistant Professor, Division of Oral Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
2
Lecturer, Oral Pathology Section, Department of Surgical Pathology, Niigata University Hospital, Niigata, Japan.
3
Resident, Oral Pathology Section, Department of Surgical Pathology, Niigata University Hospital; Graduate Student, Division of Oral Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
4
Graduate Student, Division of Oral Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
5
Assistant Professor, Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
6
Professor, Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
7
Assistant Professor, Division of Oral and Maxillofacial Radiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
8
Professor, Division of Oral and Maxillofacial Radiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
9
Associate Professor, Division of Oral Pathology, Niigata University Graduate School of Medical and Dental Sciences; Oral Pathology Section, Department of Surgical Pathology, Niigata University Hospital, Niigata, Japan.
10
Professor, Division of Oral Pathology, Niigata University Graduate School of Medical and Dental Sciences; Oral Pathology Section, Department of Surgical Pathology, Niigata University Hospital, Niigata, Japan. Electronic address: tsaku@dent.niigata-u.ac.jp.

Abstract

Hybrid odontogenic tumors including 2 or more different histologic types have been documented, but their occurrences are not very common. We present a case of hybrid odontogenic tumor composed of ameloblastoma and adenomatoid odontogenic tumor (AOT) arising in the mandibular molar region of a 31-year-old Japanese woman who had a history of familial adenomatous polyposis. The tumor, measuring 10 mm in diameter, was surgically removed from the alveolar bone. Histopathologically, the tumor consisted of both follicular and plexiform types of ameloblastoma in which multiple and smaller foci of AOT were intermingled. There have been 3 reported cases of hybrid ameloblastoma and AOT, all of which presented unicystic types as ameloblastoma components. This, however, is the first report of a hybrid tumor containing an authentic solid-type ameloblastoma compartment and an AOT compartment in a patient with a background of familial adenomatous polyposis.

PMID:
24275354
DOI:
10.1016/j.oooo.2013.08.032
[Indexed for MEDLINE]
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