Bone Pathology
A 38-year-old man presents with progressive right hip pain for 6 months. He has a history of systemic lupus erythematosus treated with long-term corticosteroids. Examination reveals painful hip range of motion, particularly with internal rotation. MRI shows a characteristic serpiginous low-signal line in the femoral head with a double-line sign on T2-weighted imaging. Regarding osteonecrosis (avascular necrosis):
Mark each as TRUE or FALSE
Osteonecrosis results from interruption of blood supply to bone leading to bone cell death; the femo...
Pathophysiology involves vascular compromise leading to osteocyte death within 6-12 hours; the body ...
Osteonecrosis is caused by infection; the knee is the most common site; trauma is the most common ca...
MRI is the gold standard for early detection with nearly 100% sensitivity; the double-line sign on T...
Treatment depends on stage and lesion size; early stages (pre-collapse) may benefit from core decomp...
Answer the questions to see explanations
Click T (True) or F (False) for each option