Question
Which anatomical site’s fracture is most likely to impair the longitudinal growth of a bone?
| A. |
Diaphysis |
| B. |
Epiphysis |
| C. |
Metaphysis |
| D. |
D : None of the above |
|
Correct Answer » B Explanation |
 |
Detailed Explanation:
Clinical Reasoning for the Correct Answer:
– The epiphysis contains the physis (growth plate), which is responsible for bone elongation during childhood/adolescence.
– Fractures involving the epiphysis (and especially the growth plate) can disrupt the function of the growth plate, potentially leading to growth arrest or angular deformities.
Why Option A is Incorrect (Diaphysis):
– Diaphysis is the shaft of the bone; its fractures do not directly affect longitudinal growth unless there is significant disruption extending into the metaphysis/growth plate.
– Classic diaphyseal fractures generally heal without affecting bone length in skeletally immature patients.
Why Option C is Incorrect (Metaphysis):
– The metaphysis is the zone between the diaphysis and epiphysis, adjacent to the growth plate but not responsible for longitudinal growth itself.
– Metaphyseal fractures seldom disturb the growth plate unless the injury extends into the physis.
Why Option D is Incorrect (None of the above):
– Option B (epiphysis) is correct, so ‘None of the above’ is not appropriate.
– At least one of the options directly relates to longitudinal bone growth involvement.