Multilocular Radiolucencies At The Angle Of Mandible

Multilocular Radiolucencies At The Angle Of Mandible

Discuss multilocular radiolucencies occurring at the angle of mandible.
Answer. Following are the multilocular radiolucencies occurring at the angle of mandible:

• Odontogenic keratocyst
• Ameloblastoma
• Ameloblastic firoma
• Odontogenic myxoma
• Cherubism
• Aneurysmal bone cyst
• Metastatic tumor of jaw
• Fibrous dysplasia.

Odontogenic Keratocyst

Its occurrence is more than 50% on angle of mandible. Undulating borders of the tumor with cloudy internal appearance is suggestive of multilocularity. It shows mediolateral expansion.

Margins of lesion are hyperostotic. In some of the subjects, it shows perforation ofbuccal and lingual cortical plates. Inferior alveolar canal undergo downward displacement. As there is enlargement oflesion the unerupted teeth get deflcted in region of angle of mandible.

Ameloblastoma

It is multilocular with presence of septa in the lesion. Arrangement and number of septa provides it the honey-comb appearance or soap-bubble appearance. Outline of tumor is smooth, well–defied, well corticated and scalloped. As there is expansion in the tumor bony compartments get coalesce and fuses. As cortical plates get thinned on expansion it is known as eggshell of bone.

Ameloblastic Fibroma

Associated with the premolar-molar area of the mandible. The lesion appears as pericoronal radiolucency. The lesion is associated with missing or unerupted tooth. Margins of the lesion are well defied with sclerotic borders. It also shows buccal and lingual expansion of jaw with intact buccal plates. Teeth get deflcted from normal path of eruption.

Odontogenic Myxoma

Lesion is well defied. Compartments of the lesion can be angular and are separated by straight septa. Lesion can be scalloped between the roots of adjacent teeth. It shows honey, comb or Tennis-racket appearance.

Cherubism

The lesion occurs at angle of mandible bilaterally. Lesion shows cyst-like radiolucency. It progresses as bony destruction at the angle of mandible and later on the expansion of lesion occur in ramus. Lesion appears as classic multilocular radiolucency because of internal radiopaque septa. Margins of lesion are well defined, well corticated as well as smooth. Buccal and lingual cortical plates also show expansion. Premature exfoliation of deciduous teeth is also seen.

Fibrous dysplasia

In its early stage, the lesion is radiolucent with ill-defined borders. In majority of cases, bony septa are apparent and appear as multilocular defect. Margins of the lesion are well defined and can blend with surrounding normal bone. Margins are surrounded by a band of increased density which gives granular appearance. Resorption of roots is also seen.

Metastatic Tumor of Jaw

Lesion is seen at angle or in complete mandible too. It is bilateral. Bone destructionshows irregular margins along with some bony islands present in radiolucent areas. Margins are ill-defied and are invasive. There is presence of punched-out radiolucency.