Central giant-cell granuloma

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Central giant-cell granuloma
Micrograph of a central giant-cell granuloma
Synonyms	Giant cell reparative granuloma
Pronounce	N/A
Specialty	N/A
Symptoms	Swelling, pain, tooth mobility, tooth displacement
Complications	Pathological fracture, root resorption
Onset	Typically in the first three decades of life
Duration	Variable
Types	Non-aggressive, aggressive
Causes	Unknown
Risks	Genetic predisposition, trauma
Diagnosis	Radiograph, biopsy
Differential diagnosis	Ameloblastoma, odontogenic myxoma, cherubism, brown tumor
Prevention	None
Treatment	Surgical curettage, corticosteroid injection, calcitonin therapy, interferon therapy
Medication	N/A
Prognosis	Generally good with treatment
Frequency	Rare
Deaths	N/A

A benign intraosseous lesion of the jaw

Central giant-cell granuloma (CGCG) is a benign intraosseous lesion that occurs predominantly in the jaws. It is characterized by the presence of multinucleated giant cells within a background of spindle-shaped stromal cells. CGCG is considered a non-neoplastic lesion, although it can exhibit aggressive behavior in some cases.

Clinical Presentation

CGCG typically presents as a painless swelling in the jaw, most commonly affecting the mandible more than the maxilla. It is often discovered incidentally on radiographic imaging or when it causes noticeable facial asymmetry. The lesion can cause tooth displacement and root resorption in adjacent teeth.

Radiographic Features

On radiographs, CGCG appears as a unilocular or multilocular radiolucency. The borders of the lesion can be well-defined or ill-defined, depending on the aggressiveness of the lesion. Panoramic radiography and cone beam computed tomography (CBCT) are commonly used to assess the extent of the lesion.

Histopathology

File:Central giant cell granuloma - very high mag.jpg

Central giant-cell granuloma

Histologically, CGCG is characterized by the presence of numerous multinucleated giant cells scattered within a fibrous stroma. The stroma contains spindle-shaped fibroblasts and capillaries. The giant cells are similar to those seen in other giant cell lesions, such as giant cell tumor of bone.

Pathogenesis

The exact pathogenesis of CGCG is not fully understood. It is thought to arise from a reactive process, possibly in response to local trauma or inflammation. Some studies suggest a possible genetic component, with mutations in the SH3BP2 gene being implicated in some cases.

Treatment

The treatment of CGCG depends on the size and behavior of the lesion. Small, non-aggressive lesions may be managed with curettage alone. More aggressive lesions may require en bloc resection. Adjunctive therapies, such as corticosteroid injections, calcitonin, or interferon therapy, have been used to reduce the size of the lesion before surgical intervention.

Prognosis

The prognosis for CGCG is generally good, with a low recurrence rate following complete surgical removal. However, aggressive lesions have a higher risk of recurrence and may require more extensive surgical management.

See also

• Giant cell tumor of bone
• Jaw tumors
• Fibro-osseous lesions