Imaging Sci Dent.  2015 Dec;45(4):241-245. 10.5624/isd.2015.45.4.241.

Desmoplastic variant of ameloblastoma of the maxilla: A case report

• Koh KJ
• Park HN
• Kim KA

• KMID: 2132937
• DOI: http://doi.org/10.5624/isd.2015.45.4.241

Abstract

The desmoplastic variant of ameloblastoma is a rare form of ameloblastoma characterized by unique radiographic and histologic features. A 46-year-old female was referred to our hospital, complaining of swelling in the left upper lip area. Radiographic findings revealed an ill-defined multilocular lesion with a large cystic lesion and thick sclerotic trabeculae on the left anterior maxilla. After the patient underwent partial osteotomy, histologic analysis revealed a desmoplastic ameloblastoma with no evidence of a hybrid lesion or cyst formation. The radiographic findings in the present case were different from those described in previous case reports. These findings are of special importance due to the unfamiliar radiographic and histologic features of this lesion.

Keyword

Ameloblastoma; Jaw; Neoplasms

MeSH Terms

Ameloblastoma*
Female
Humans
Jaw
Lip
Maxilla*
Middle Aged
Osteotomy

Figure

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  Fig. 1 A panoramic radiograph shows an ill-defined multilocular radiolucency with a large cystic lesion extending from the left upper central incisor to the premolar region and displacement of the left upper lateral incisor and canine.

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  Fig. 2 Periapical radiographs show a large cystic lesion on the apical region of the left upper central incisor area and an ill-defined multilocular radiolucency with thick sclerotic trabeculae on the left upper anterior maxilla with displacement of the adjacent lateral incisor and canine.

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  Fig. 3 The axial (A), coronal (B) computed tomographic (CT) images show an ill-defined multilocular lesion with a large cystic lesion, thick trabeculae, expansion, and perforation of the both buccal and palatal cortical plates. C. A sagittal CT image shows an ill-defined multilocular radiolucency with a large cystic lesion. D. A sagittal CT image shows bony expansion to the left maxillary sinus.

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  Fig. 4 Photomicrographs show small, scattered tumor nests and new bone formation, as well as desmoplastic changes in the stroma. A. H&E stain, 100×. B. H&E stain, 200×.

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