📝 “What are Key Features of the Plexiform Ameloblastoma?”

8.21.24

Quick Review #210 - #pathology #oralpathology #doctorgallagher #oralsurgery #oralsurgeon #dentist #dentistry #dental #ameloblastoma #plexiform

The Plexiform Ameloblastoma:

Clinical Features:

• Presentation: Typically presents as a slow-growing, painless swelling in the jaw, most commonly affecting the mandible. It can cause facial asymmetry and, in some cases, displacement or loosening of teeth.

• Age and Gender: Often occurs in the third to fifth decades of life with no significant gender predilection.

Radiographic Features:

• Appearance: Radiographically, it appears as a multilocular or unilocular radiolucency. The borders are usually well-defined, often with a “soap bubble” or “honeycomb” appearance.

• Location: Primarily affects the posterior mandible, but can also be found in the maxilla.

Histopathological Features:

• Plexiform Pattern: Characterized by long, anastomosing strands of odontogenic epithelium within a loosely arranged connective tissue stroma. The epithelium is composed of a peripheral layer of columnar or cuboidal cells that resemble ameloblasts with reversed polarity (nuclei positioned away from the basement membrane).

• Stroma: The connective tissue stroma is typically loose, allowing for the characteristic anastomosing pattern of the epithelial strands.

• Basal Cell Layer: Cells in the basal layer are hyperchromatic and may show subnuclear vacuolization, which is a hallmark of ameloblastomas.

Treatment Options:

• Conservative Treatment: Includes enucleation or curettage. This approach is associated with a higher recurrence rate because the tumor’s plexiform pattern tends to infiltrate surrounding bone.

• Radical Treatment: Resection with wide margins is recommended, particularly for larger lesions or those located in areas where recurrence would be particularly problematic. This approach aims to minimize the risk of recurrence.

Factors for Treatment Selection:

• Size and Location: Larger lesions or those in critical anatomical locations (e.g., maxilla, where resection can lead to significant morbidity) may warrant more aggressive treatment.

• Recurrence Risk: Given the higher recurrence rate with conservative treatment, resection is often preferred, particularly in younger patients or when follow-up may be challenging.

References:

1. Gill, J., Kaur, S., & Intern, B. (2016). Plexiform ameloblastoma: A case report. Semantic Scholar. Retrieved from https://lnkd.in/eYQGvr7c

2. Barnes, L., Eveson, J. W., Reichart, P., & Sidransky, D. (2005). World Health Organization Classification of Tumours: Pathology and Genetics of Head and Neck Tumours (3rd ed.). IARC Press.

3. Neville, B. W., Damm, D. D., Allen, C. M., & Chi, A. C. (2022). Oral and Maxillofacial Pathology (4th ed.). Saunders.

4. ChatGPT.2024

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