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Orthopaedic

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Metabolic Bone Diseases

Question
3 out of 42
 

If, on microscopic examination of the metaph¬ysis of a long bone, all the trabeculae of can¬cellous bone-even well away from the epi-physeal plate-contained cores of cartilage matrix, the most likely diagnosis would be



A Osteopetrosis

B osteomalacia

C Achondroplasia

D Ollier's disease

Ans. A

Osteopetrosis

The characteristic feature of osteopetrosis (marble bones) is the per­sistence (failure of resorption) of the primary trabeculae of endochondral bone, i.e., bone that was formed on cartilage cores. The primary spongiosa with its cartilage cores does not persist in any of the other listed conditions.

Metabolic Bone Diseases Flashcard List

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