What are the types of ameloblastoma?

The four main types include:

  • Conventional ameloblastoma. This is the most common type and grows aggressively, usually in the lower jawbone, and approximately 10% recur after treatment.
  • Unicystic ameloblastoma.
  • Peripheral ameloblastoma.
  • Metastasizing ameloblastoma.

Which type of ameloblastoma is more common?

Out of these types, conventional ameloblastoma is the most common, representing 85% of all ameloblastomas, and occurs mainly in the 3rd and 4th decades of life. (Sham et al. 2009; Hertog et al. 2012) Its biological behavior is considered more aggressive due to its higher incidence of recurrence.

How do you distinguish between odontogenic Keratocyst and ameloblastoma?

Most OKCs showed smooth border and unilocular shape, while most ameloblastomas showed scalloped border and multilocular shape. Compared with ameloblastomas, OKCs showed greater frequency to be associated with impacted tooth, and were unlikely to cause tooth displacement and root resorption.

How can you tell the difference between Dentigerous cyst and ameloblastoma?

Although the presence of a tooth within a lucent mass is pathognomonic for a dentigerous cyst, the aggressive features of portions of the mass and the presence of solid enhancing nodular foci were inconsistent with this type of cyst. Thus, ameloblastoma was the primary differential diagnosis.

Which variant of ameloblastoma is aggressive?

The granular cell ameloblastoma is aggressive tumors with high chances to metastasize.

Which type of ameloblastoma has highest recurrence rate?

The overall recurrence rate of ameloblastoma with current methods of treatment is approximately 10% (7), and recurrent cases are malignant (11). This result is relatively high for a benign tumor.

What is plexiform ameloblastoma?

It is an aggressive benign tumor of epithelial origin which may arise from the enamel organ,3 follicle, periodontal ligament,4 and lining of an odontogenic (dentigerous) cyst3,4 or the marrow of the jaws. Ameloblastomas are infamous for their invasive growth and their tendency to recur.

Is ameloblastoma encapsulated?

Ameloblastoma is a non-encapsulated and slow-growing tumor with high recurrence rate. Orbital involvement by this neoplasm is an extremely rare entity.

What is odontogenic Keratocyst?

An odontogenic keratocyst is a rare and benign but locally aggressive developmental cyst. It most often affects the posterior mandible and most commonly presents in the third decade of life. Odontogenic keratocysts make up around 19% of jaw cysts.

How many types of Dentigerous cysts are there?

Two types of dentigerous cysts are reported in the literature: Developmental and inflammatory types. The developmental type of these cysts is the most common type, which surrounds the crown of an unerupted tooth by the fluid accumulation between the layers of the enamel organ.

What is cystic ameloblastoma?

INTRODUCTION. Ameloblastoma is the commonest odontogenic tumour in Africans and Asians and arguably the most clinically significant, odontogenic tumour. 1. Ameloblastoma is classified clinically into solid, cystic, peripheral, malignant and carcinomatous types.

What is malignant ameloblastoma?

The term “malignant ameloblastoma” describes a tumor having benign histological features but showing evidence of metastasis. 1,5. The commonest site of occurrence is the mandible, followed by the maxilla, with a patient age range of 5 to 74 years.