Guess the diagnosis?

The answer is Osteosarcoma

Osteosarcoma is the most common type of cancer that arises in bones. It most often affects pre-teens and teens; this may be related to the “growth spurt” most children experience at this age. The average age at diagnosis is 15.

Differential diagnosis include: Rhabdomyosarcoma and Synovial sarcoma.

Symptoms of osteosarcoma include:
Bone pain or tenderness.
A mass (tumor) that can be felt through the skin.
Swelling and redness at the site of the tumor.
Increased pain with lifting (if it affects an arm).
Limping (if it affects a leg).
Limited movement (if it affects a joint).
Broken bone (sometimes after a simple movement).

Diagnosis is made by a combination of clinical examination by a doctor and imaging tests and confirmed by the results of a biopsy.

Modalities of treatment are chemotherapy and surgical resection (usually amputation). Because osteosarcomas are not particularly responsive to radiotherapy, surgery is the only option for definitive tumor removal.

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