A professor has taught the class about giant cell bone tumors. Which statement by a student would require the professor to review the material?
◦ Giant cell tumors are an overexpression of genes including osteoprotegerin ligand (OPGL).
◦ The tumors are malignant, solitary, and irregularly shaped.
◦ Giant cell tumors are typically located in the epiphysis in the femur, tibia, radius, and humerus.
◦ They are slow-growing tumors that extend over the articular cartilage.