Which of the following is wrong regarding non ossifying fibroma (AIIMS May 2009)
|A||It is a development defect in which a nest of fibrous tissue appears in bone and persists|
|B||commonest sites are metaphysis or long bones|
|C||there is high risk for malignant transformation|
|D||If the defect is large may require curettage and bone grafting|
there is high risk for malignant transformation
a. Non ossifying fibroma is a developmental defect commonly encountered in children and an incidental finding on x-ray the commonest sites are the metaphyses of long bones occasionally there are multiple lesions the X-ray appearance is characteristic there is radiolucent area surrounded by thin margin of dense bone.
b. Views in different planes show that the lesion thf3t appears to be central is actually adjacent to or within the cortex, hence the alternative name 'fibrous Cortical Defect'. There is no risk of malignant transformation.