PMC5443997_01
An image of the oral cavity obtained during the initial examination showing a painless mass in the lower right premolar region.
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A 40-year-old male patient presented to our hospital with a complaint of swelling in the right lower premolar region (Figure 1). During a clinical examination, a firm swelling of the right mandibular alveolar ridge, which extended from the lateral incisor to the second premolar, was observed (Figure 1).
A panoramic radiograph showing a well-defined large radiolucent lesion in the right mandible.
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A panoramic radiograph revealed a radiolucent lesion with a well-defined border and root displacement of the canine and first premolar without root resorption (Figure 2).
(a) Axial and (b) coronal computed tomography scans showing a large unilocular radiolucent lesion in the right mandible.
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Computed tomography of the lesion showed a predominantly lytic expansile unilocular lesion measuring 40 x 35 x 35 mm (Figure 3).
The surgical specimen had a gourd-like shape, and its cross section contained a solid portion and a cystic lesion (arrow).
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The enucleated sample was firm and had an irregular shape, and its cut surface was solid, whitish, and partially cystic (Figure 4).
(a) A histopathological image showing a mixture of follicular and desmoplastic ameloblastoma. (x10) (b) A histopathological image showing stellate-shaped epithelial islands together with squamous metaplasia in the collagenized fibrous stroma containing connective tissue. (x40) (c) A histopathological image showing typical follicular ameloblastoma together with cystic degeneration and squamous metaplasia (x40).
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In addition, areas of cystic degeneration and squamous metaplasia were also seen (Figure 5).
(a) A panoramic radiograph obtained just after the operation showing a well-defined large unilocular radiolucent lesion in the right mandible. (b) A panoramic radiograph and (c) axial and (d) coronal computed tomography obtained at 22 postoperative months showing that the radiopaque area had increased in size.
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The patient's postoperative course was uneventful, and a follow-up review conducted at 22 postoperative months showed no evidence of recurrence (Figure 6).