What is giant cell tumor of the bone?

What is a giant cell tumor? Giant cell tumor of bone is a rare, aggressive non-cancerous tumor. It generally happens in adults between ages 20 and 40 when skeletal bone growth is complete. It usually develops near a joint at the end of the bone.

What causes GCT?

The cause of giant cell tumors is unknown. The tumors occur spontaneously. They are not known to be caused by trauma, environmental factors, or diet. Giant cell tumors of bone are not inherited.

What is another name for Osteoclastoma?

The giant cell tumor of bone (GCTB), also known as an osteoclastoma or a myeloid sarcoma, is a benign local aggressive osteolytic neoplasm that primarily affects skeletally mature young adults.

Are GCT malignant?

Malignant giant cell tumor (GCT) of bone is a rare tumor with debilitating consequences. Patients with GCT of bone typically present with mechanical difficulty and pain as a result of bone destruction and are at an increased risk for fracture.

What are the types of giant cells?

Types of Giant Cells

• Macrophage derived. Langhans’ giant cells. Foreign body giant cells (FBGCs)
• Epidermal cell derived. Tzanck giant cells. Multi-nucleated epidermal giant cells.
• Melanocyte derived. Starburst giant cells. Giant cells in melanocytic nevus.
• Other giant cells. Floret-like multi-nucleated giant cells (FMGCs).

How is giant cell tumor diagnosed?

Diagnostic tests, including radiology scans, help diagnose a giant cell tumor. Your healthcare provider may use: Imaging tests, such as an X-ray, CT scan or MRI, look at your bone or cartilage. Bone scans use a safe radioactive dye and imaging scans to look for a bone GCT.

What is giant cell?

Giant cells are formed by fusion of various cells such as macrophage, epithelioid cells, monocytes, etc., These are multi-nucleated,[1] large in size, and most of the times present at the site of chronic inflammation and other granulomatous conditions.

What is Codmans triangle?

Codman triangle is a radiologic sign seen most commonly on musculoskeletal plain films. It is the name given to a periosteal reaction that occurs when bone lesions grow so aggressively they lift the periosteum off the bone and do not allow the periosteum to lay down new bone.

Is GCT a sarcoma?

Giant cell tumor (GCT) of bone is a generally benign, but often locally aggressive, neoplasm of bone, with a propensity for recurrence. Sarcomatous transformation is rare and typically occurs with a history of recurrences and radiation treatment.

What is the function of giant cell?

Foreign body giant cells (FBGC) most commonly are observed at the tissue/material interface of implanted medical devices, prostheses, and biomaterials (**2). In this context, adherent macrophages and foreign body giant cells constitute the foreign body reaction (Figure 1).

What does giant cell mean?

giant cell, also called Langhans giant cell, large cell characterized by an arc of nuclei toward the outer membrane. The cell is formed by the fusion of epithelioid cells, which are derived from immune cells called macrophages.

What are symptoms of giant cell tumor?

What are the symptoms of a giant cell tumor?

• A visible bump.
• Bone break (fracture)
• Fluid buildup in the joint nearest the affected bone.
• Limited movement in the nearest joint.
• Swelling.
• Pain at the nearest joint.

What are types of giant cells?

What are different types of giant cells?

Types include foreign-body giant cell, Langhans giant cell, Touton giant cells, Giant-cell arteritis, and Reed–Sternberg cell.

Why Codman triangle is formed?

Codman triangle (previously referred to as Codman’s triangle) is the triangular area of new subperiosteal bone that is created when a lesion, often a tumour, raises the periosteum away from the bone. A Codman triangle is not actually a full triangle.

What causes Codman’s triangle?

Codman’s triangle is the radiographic appearance of the rim of new subperiosteal bone which forms when a lesion such as a tumour lifts the periosteum away from the bone. The small triangle of bone is seen at the advancing margin of the lesion.

Does giant cell tumor metastasis?

Giant cell tumors of bone are sometimes locally aggressive and may metastasize, although uncommonly.

How are giant cell tumors diagnosed?

How is a giant cell tumor diagnosed?

1. Biopsy. A small sample of tissue is taken and tested.
2. Radionuclide bone scan. This is a nuclear imaging test.
3. X-ray. This test uses a small amount of radiation to make images of tissues, bones, and organs on film.
4. CT scan.
5. MRI.

What is the function of giant cells?

Their differentiation into macrophages is crucial for a broad array of immunologic processes that regulate inflammation, neoplasia, and infection. In certain pathologic conditions, such as foreign body reactions and peripheral inflammatory lesions, monocytes fuse to form large, multinucleated giant cells (MGCs).

What is soap bubble appearance?

Soap bubble appearance describes: A multi-loculated bubbly appearance. In bone refers to : an expansile lytic lesion with internal trabeculations and preserved cortex, usually of benign nature. May be used to describe more aggressive lesions.

What causes a giant cell tumor?

Age. Giant cell arteritis affects adults only,and rarely those under 50.

Sex. Women are about two times more likely to develop the condition than men are.

Race and geographic region. Giant cell arteritis is most common among white people in Northern European populations or of Scandinavian descent.

Polymyalgia rheumatica.

Family history.

What are giant cell tumors?

Giant Cell tumors (GCT) are benign tumors with potential for aggressive behavior and capacity to metastasize. Although rarely lethal, benign bone tumors may be associated with a substantial disturbance of the local bony architecture that can be particularly troublesome in peri-articular locations. Its histogenesis remains unclear.

What does giant cell tumor mean?

A giant cell tumor is one that is made up of a large number of benign (noncancerous) cells that form an aggressive tumor. It usually develops near a joint at the end of the bone. The location of a giant cell tumor is often in the knee, but can also involve the bones of the arms and the legs, or the flat bones such as the breastbone or pelvis.

Are giant cell tumors cancerous?

Giant cell tumors usually occur in young adults, and are slightly more common in females. They are quite rare, occurring in only about one out of every one million people per year. Although giant cell tumors are not cancerous, they are aggressive and can destroy the surrounding bone.