Image Based Question-71963

A 25 year old male preseted with swelling and pain in the knee joint.X ray shows the following features.What can be the most possible diagnosis?

A. Giant Cell Tumor

B. Simple Bone Cyst

C. Aneurysmal Bone Cyst

D. Fibrous Dysplasia

Correct Answer » A Explanation

Ans:A. Giant Cell Tumor

DIFFERENTIAL DIAGNOSIS OF A SOLITARY BONE LESION

RADIOLOGICAL FEATURES OF GIANT CELL TUMOR(OSTEOCLASTOMA)

• A solitary, may be loculated, lytic lesion.

• Eccentric location, often subchondral .

• Expansion of the overlying cortex (expansile lesion).

• ‘Soap-bubble’ appearance – the tumour is homogeneously lytic with trabeculae of the remnants of bone traversing it, giving rise to a loculated appearance.

• No calcification within the tumour .

• None or minimal reactive sclerosis around the tumour.

• Cortex may be thinned out, or perforated at places.

• Tumour usually does not enter the adjacent joint.