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Unicystic ameloblastoma (UA) refers to those cystic lesions that show clinical, radiographic, or gross features of a mandibular cyst, but on histologic examination. A clinicopathological study of 57 unicystic ameloblastomas has been undertaken, which represents 15% of all cases of ameloblastoma accessioned in our. 21 Jun Mandible / maxilla – Benign tumors / tumor-like conditions: ameloblastoma – unicystic variant.

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Even though the lesion is not as aggressive as the solid ameloblastoma, an accurate histopathologic diagnosis is essential for the treatment and prognosis.

The unicystic ameloblastoma: a clinicopathological study of 57 cases.

Introduction Ameloblastomas have been categorized into three biologic variants: Am J Surg Pathol ; Another subgrouping by Philipsen and Reichart[ 8 ] has also been described as follows:. Hence, it presents as a challenge both for its diagnosis and treatment.

The biopsy tissue shows multiple cystic lesions and collagenous wall of varying thickness. Incisional biopsy was performed and sent for histopathological analysis and a diagnosis of UA with mural proliferations was made uhicystic on histological picture [ Figure 3 ]. Histologically, the minimum criteria for diagnosing a lesion as UCA are the demonstration of a single cystic sac lined by odontogenic ameloblastomatous epithelium often seen only in focal areas [ 20 ].

Unicystic variant of ameloblastoma with aggressive histologic behaviour also might be successfully treated with marsupialisation with subsequent enucleation, and this approach can be considered as an alternative to resection.

Based on fluctuant consistency and positive aspiration all the multilocular lesions have unicyatic ruled out. There have been many debates regarding whether unicystic ameloblastoma develops unicysti novo or arises in an existing cyst.

Usefulness of Contrast enhanced-MRI in the diagnosis of unicystic ameloblastoma. Diagnostic imaging of the jaws. Here, we report a uunicystic of unicystic ameloblastoma UA in a year-old female with an unusual large multilocular radiographic appearance on the right body of mandible.

UAs have clear preponderance for the unilocular pattern. Pakistan Oral and Dent J. In place of the right mandibular first molar, only root stumps amelohlastoma present, but molar and premolar adjacent to it tested vital.

The radiographic appearance of UCAs has been divided into 2 main patterns: An ideal treatment method unicyatic mandibular ameloblastoma. A prognostically distinct entity. It was nonpulsatile and noncompressible, and no discharge was present. Accessed November 9th, A variant of ameloblastoma with a low recurrence rate after enucleation.

The lesion also caused a displacement of the right inferior alveolar canal toward the cortical inferior border of the mandible. The most common tumor of odontogenic origin is ameloblastoma which develops from epithelial cellular elements and dental tissues in their various phases of development.

Immediate post-operative intraoral view of the patient with adequate mouth opening. In differential diagnosis, ameloblastoma, calcifying epithelial odontogenic tumor CEOTodontogenic keratocyst OKCcentral giant cell granuloma CGCGunicyetic myxoma were considered but features like old age, site, multilocularity of ameloblastoma, and impacted lower canine made us deviate from ameloblastoma.

Recommended articles Citing articles 0. Sign up for our Email Newsletters. Tenderness was elicited on palpation irt 33, 34, and Unicystic ameloblastoma of the mandible: Mucosal ulceration is rare but may be caused by continued growth of the tumor [ 12 ]. Resorption of first molar roots seen. Open in a separate window.

Unusual imaging appearance of unicystic ameloblastoma

However, histopathologic examination revealed UA. Under local anesthesia, an incision was made from distal of third molar to the medial of canine.

Unilocular, scalloped, macromultilocular, pericoronal, interradicular, or periapical expansile radiolucencies. Author information Copyright and License information Disclaimer.

Unicystic ameloblastoma: A diagnostic dilemma

Journal List Contemp Clin Dent v. Nil, Conflict of Interest: Intraorally, a well-defined swelling was present extending from mesial surface of right first molar to retromolar region, involving the edentulous region in relation to the right mandibular second and third molar teeth [ Figure 1 ].

The diagnosis of unicystic ameloblastoma was based on clinical, radiological, histopathologic, and CT features. This swelling is the result of an expansion of the cortical plates of the jaw and can be identified by palpation as hard and bony.

Neither discharge nor pulsations were seen. Footnotes Source of Support: Thirdly, there was no root resorption of any tooth which ameloglastoma indicate the aggressive nature of the lesion. Medical University Erstwhile K.

There are thin plates of lamellar bone with focal osteoid deposition and patchy areas of hemorrhage. Ameloblastomas are uunicystic tumors whose importance lies in its potential to grow into enormous size with resulting bone deformity. Routine investigations like complete blood picture were done, which were normal. She presented with progressive swelling of the right lower deciduous molar region for 3 months. Support Center Support Center. The aspirate was sent for pathological evaluation and the report stated it to be a cystic fluid with inflammatory exudates, confirming the clinical and radiographic diagnosis of radicular cyst in association with root stumps of Radiographically, most of ameloblastomas show multilocularity, whereas unicystic ameloblastomas show a ameloblastoka large unilocular radiolucency.