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There is a positive Hawkins sign, indicating the patient is unlikely to develop osteonecrosis.
77%
154/200
There is a positive Hawkins sign, indicating the patient has developed osteonecrosis.
8%
16/200
Hawkins sign cannot be determined on radiographs; therefore, MRI is required.
4%
7/200
No Hawkins sign is visible, and therefore the patient is not likely to develop osteonecrosis.
No Hawkins sign is visible; therefore, the patient should be kept non-weight-bearing until a Hawkins sign appears
7%
14/200
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The radiographs reveal a positive Hawkins sign, a subchondral lucency in the talar dome best seen on a mortise radiograph indicating viability of the talar body. Once a Hawkins sign appears, it is unlikely that that the patient will develop osteonecrosis. Osteonecrosis is best diagnosed with radiographs. Although MRI can be helpful in assessing the extent of osteonecrosis, it is unnecessary for purely diagnostic purposes. A Hawkins sign typically will appear at 6 to 8 weeks after fracture; however, the absence of a Hawkins sign at that time does not necessarily indicate osteonecrosis. Most authors agree that even in the absence of a Hawkins sign, weight bearing can commence at 10 to 12 weeks after surgery.
3.5
(8)
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