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. 2013:2013:706128.
doi: 10.1155/2013/706128. Epub 2013 Jun 3.

Papilliferous keratoameloblastoma: an extremely rare case report

Neeta Mohanty  1 , Varun Rastogi, Satya Ranjan Misra, Susant Mohanty
Affiliations

Papilliferous keratoameloblastoma: an extremely rare case report

Neeta Mohanty et al. Case Rep Dent. 2013.

Abstract

Odontogenic tumors develop in the jaw bones from the odontogenic tissue-oral epithelium in tooth germ, enamel organ, dental papilla, reduced enamel epithelium, remnants of Hertwig's root sheath or dental lamina, and so forth. Hence, a bewildering variety of tumors are encountered in the maxilla and mandible. Ameloblastoma is the second most common odontogenic neoplasm after odontomes, and it has numerous clinical and histologic variants. We report a very rare histologic variant: the papilliferous keratoameloblastoma which is the fifth reported case in the English literature.

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Figures

Figure 1
Figure 1
Intraoral swelling with bicortical expansion extending from 44 to 48 region.
Figure 2
Figure 2
Lateral oblique projection of the body of the mandible showing a multilocular radiolucency, extending from first premolar to the angle of the mandible.
Figure 3
Figure 3
Axial view CT scan showing bicortical expansion with perforation of the buccal and lingual cortices on the right side.
Figure 4
Figure 4
3D reformatted CT scan showing perforation of the mandible from 44 to angle region on right side.
Figure 5
Figure 5
H & E section (10X) showing cystic spaces filled with the necrotic debris and lined by papillary (Yellow arrow) keratin lined infolding of odontogenic epithelium resembling ameloblastoma with connective tissue cores.
Figure 6
Figure 6
H & E section (10X) showing cystic spaces lined by papillary keratin lined infolding (Yellow arrow) of odontogenic epithelium.
Figure 7
Figure 7
Cystic spaces showing squamous metaplasia (Yellow arrow) and presence of keratin squames (H & E 10X).
Figure 8
Figure 8
Odontogenic epithelium consisting of loosely arranged polygonal/angular cells resembling stellate reticulum (Yellow arrow) of the enamel organ and basal layer of tall columnar ameloblast-like cells (Blue arrow) showing palisading and reversal of polarity (H & E 40X).
Figure 9
Figure 9
Loosely arranged polygonal/angular cells resembling stellate reticulum (Yellow arrow) of the enamel organ and basal layer of tall columnar ameloblast-like cells (Blue arrow) showing palisading and reversal of polarity (H & E 40X).
See this image and copyright information in PMC

References

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