Bone Tumors MCQs

A 15-year-old male presents with worsening knee pain. Radiographs reveal a metaphyseal aggressive bone lesion with a 'sunburst' periosteal reaction and Codman's triangle.

Biopsy confirms a high-grade intramedullary osteosarcoma. What is the standard algorithmic approach to treatment for this patient?

A 65-year-old male presents with deep bone pain, fatigue, and recent weight loss.

Radiographs demonstrate multiple 'punched-out' lytic lesions in his skull, pelvis, and proximal femurs. Based on the most likely diagnosis, which of the following laboratory findings is expected?

A 65-year-old male presents with severe, atraumatic mid-back pain. Radiographs reveal a compression fracture of T8. Laboratory workup shows anemia, hypercalcemia, and an elevated creatinine. Serum protein electrophoresis demonstrates a monoclonal spike. Which of the following is the most sensitive and appropriate imaging modality to detect additional osteolytic bone lesions in this patient?

Which variant of osteosarcoma is characteristically located on the surface of the bone, frequently involves the posterior cortex of the distal femur, features a heavily ossified broad base on imaging, and generally carries an excellent prognosis with wide surgical resection alone?

A 14-year-old boy is undergoing neo-adjuvant chemotherapy for an osteosarcoma of the distal femur. His regimen includes Doxorubicin, Cisplatin, and high-dose Methotrexate. Which of the following is a classic dose-limiting toxicity specifically associated with Doxorubicin?

A 16-year-old male presents with severe nocturnal thigh pain that is rapidly relieved by NSAIDs. Radiographs demonstrate a small radiolucent nidus surrounded by dense sclerotic reactive bone in the proximal femur. After failing medical management, which of the following is the most appropriate initial definitive treatment?

A 14-year-old patient with high-grade conventional osteosarcoma is undergoing a neo-adjuvant chemotherapy regimen (MAP: Methotrexate, Doxorubicin, Cisplatin).

Which of the following is the most significant, dose-limiting toxicity specific to Doxorubicin?

A 19-year-old male presents with severe right thigh pain that is classically worse at night and dramatically relieved by NSAIDs. A CT scan reveals a 7 mm radiolucent nidus surrounded by dense reactive sclerosis in the femoral cortex. What is the most definitive and minimally invasive treatment modality for this condition?

A 10-year-old boy incidentally undergoes an x-ray for a minor ankle sprain, revealing a cortically based, radiolucent lesion surrounded by a thick rim of reactive sclerosis in the distal tibial diaphysis. He describes severe pain at night that is dramatically relieved by NSAIDs. What is the most likely diagnosis?

A 15-year-old boy presents with progressive, severe diaphyseal tibial pain that is characteristically worse at night and rapidly relieved by ibuprofen.

Radiographs show a dense sclerotic cortical thickening with a small radiolucent nidus. Which of the following best describes the pathophysiologic mechanism of this pain?

A 19-year-old male presents with dull, aching back pain that is worse at night. Radiographs and CT demonstrate a 2.5 cm radiolucent lesion with a sclerotic margin in the posterior elements of L4. Biopsy shows woven bone trabeculae lined by prominent osteoblasts in a vascular connective tissue stroma. What is the most likely diagnosis?

Which of the following genetic mutations is most frequently identified in patients with central chondrosarcoma and is also considered a hallmark of multiple enchondromatosis (Ollier disease and Maffucci syndrome)?

A 25-year-old male presents with chronic, dull posterior knee pain. Radiographs show a heavily ossified, lobulated mass attached by a broad base to the posterior cortex of the distal femur. MRI confirms no medullary involvement. Biopsy reveals a low-grade spindle cell stroma with well-formed woven bone trabeculae. What is the most likely diagnosis and its general prognosis compared to conventional osteosarcoma?

What specific genetic mutation is strongly associated with the pathogenesis of multiple enchondromatosis (Ollier disease and Maffucci syndrome)?

A 55-year-old man undergoes resection of a large cartilaginous tumor of the proximal femur. Histopathology reveals abundant hyaline cartilage with hypercellularity, binucleate cells, and myxoid changes without osteoid matrix production. Which genetic mutation is most frequently associated with this primary bone malignancy?

When differentiating an osteoblastoma from an osteoid osteoma based on histological and clinical features, which of the following characteristics is definitive for an osteoblastoma?

A 15-year-old male presents with painful thoracolumbar scoliosis. Imaging reveals a 7 mm radiolucent nidus with surrounding sclerosis in the pedicle of T11 on the concave side of the curve. The lesion is situated 2 mm from the traversing nerve root. What is the most appropriate definitive management?

A 16-year-old male complains of severe night pain in his right mid-thigh that is dramatically relieved by aspirin. Radiographs show a thickened cortical diaphyseal area with a 7 mm radiolucent nidus. What is the most appropriate initial definitive treatment for this condition?

A 14-year-old boy presents with a painful scoliosis that is worse at night and relieved by NSAIDs. Imaging reveals a radiolucent nidus with surrounding sclerosis in the pedicle of T8 on the right side. How will this scoliotic deformity most likely present clinically?