Donald is a 14-year-old patient who is being seen today because of severe pain and swelling in his lower left leg. Donald can walk on it, but he says that walking or moving the leg in any way makes the pain much worse. Which of the following disorders or diseases would the practitioner test for given the patient's complaints and symptoms?

A) Paget's disease
B) Lordosis
C) Kyphosis
D) Osteoporosis
E) Osteosarcoma

Osteosarcoma

A type of cancer that originates in bone cells and is most commonly found in the long bones near growth plates.

Paget's Disease

A chronic disorder that typically results in enlarged and deformed bones due to abnormal bone destruction and regrowth, primarily affecting the elderly.

Osteoporosis

A condition characterized by a decrease in bone density, leading to fragile bones that are more prone to fractures.