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A 7-year-old child is brought with recurrent fractures after minor trauma since early childhood. Examination reveals blue-tinged sclerae and progressive hearing difficulty. There is no evidence of nutritional deficiency. What is the most likely diagnosis?
A 55-year-old woman on long-term glucocorticoid therapy develops vertebral compression fractures. Bone mineral density is markedly reduced, while serum calcium and phosphate levels are normal. What is the most likely effect of excessive steroid intake?
An elderly man presents with progressive enlargement of the skull and bone deformities. Histology reveals irregularly arranged lamellar bone separated by prominent cement lines. What is the most likely diagnosis?
A 30-year-old man sustains a femoral fracture. Ten days later, there is active remodeling at the fracture site, with removal of necrotic bone fragments. What is the most important function of osteoclasts at this stage?
Which Bacteria is the Most Common Cause of Osteomyelitis in General Population?
A 10-day-old neonate presents with fever and decreased movement of one lower limb. Examination reveals tenderness over the metaphysis of a long bone. Hematogenous osteomyelitis is suspected. Which bacteria common causes osteomyelitis in neonates?
A patient with long-standing bone infection develops areas of dead bone surrounded by reactive new bone formation. Imaging shows a fragment of necrotic bone encased by a thick shell of newly formed subperiosteal bone produced during the chronic inflammatory process. The sheath of newly formed bone surrounding the infected necrotic bone is called
A patient presents with chronic back pain and progressive spinal deformity. Imaging shows destruction of vertebral bodies with collapse leading to kyphosis and possible paravertebral soft tissue involvement. Pott's disease is a form of osteomyelitis caused by:
What is the most common primary malignant tumor of bone?
A teenager presents with localized bone pain and swelling. X-ray reveals a triangular area of new subperiosteal bone formation where the periosteum has been lifted by an underlying aggressive bone lesion. This radiographic finding is known as:
A 15-year-old adolescent presents with localized pain and swelling in the diaphysis of the femur. Imaging shows a onion skin pattern . Biopsy reveals a malignant bone tumor composed of primitive, undifferentiated small round blue cells. The most likely diagnosis is:
A 62-year-old patient presents with pelvic pain and a gradually enlarging mass. Biopsy shows a malignant cartilaginous tumor with variable cellularity and nuclear atypia. The most likely diagnosis is:
A 14-year-old adolescent presents with localized bone pain near the knee. Imaging reveals a metaphyseal lesion arising from the long bone. Considering primary bone tumors in this age group, which is the most common?
Which of the following is a correct statement about Giant Cell Tumor of bone?
A 60-year-old patient presents with pain and stiffness in the fingers. Examination reveals bony nodules at the distal interphalangeal (DIP) joints. The formation of osteophytes at the margins of the DIP joints, known as Heberden's nodes, is characteristic of:
A 35-year-old retired football player complains of intermittent pain in his right knee. He reports brief morning stiffness that improves within minutes of activity, but the pain becomes worse by the end of the day after prolonged use of the joint. This clinical picture is most suggestive of:
A 48-year-old patient presents with a firm, non-tender 1 cm subcutaneous nodule on the extensor surface of the forearm. Histologic examination shows a central area of fibrinoid necrosis surrounded by palisading macrophages and a peripheral rim of chronic inflammatory cells. What is the most likely associated laboratory finding?
A 40-year-old man with a history of Sickle Cell Anemia presents with sudden pain, redness, and swelling of the right knee following a minor fall. He also has fever and leukocytosis. The joint is warm, tender, and movement is markedly restricted. What is the most likely diagnosis?
