Looser zones

Case contributed by Rodney Strahan
Diagnosis certain

Presentation

Patient presented with right ankle pain following a fall while walking. Treated with immobilization for 3 months but no healing callus seen.

Patient Data

Age: 60 years
Gender: Female
x-ray

Comminuted, posteriorly angulated distal tibia and fibula fractures in bones that are osteopenic. There is mild sclerosis along the fracture lines but no appreciable callus, even 5 months after the original injury. This would constitute delayed union but not non-union.

x-ray

Horizontal lucent lines with sclerotic borders in the lesser trochanter bilaterally. In addition, there are bilateral inferior pubic rami fractures with sclerosis.

Incidental calcified uterine fibroid in the pelvis noted.

x-ray

Bilateral proximal ulna fractures, with a wide zone of lucency on the right. Additionally, there is a right radial neck fracture.

Case Discussion

Looser zones are insufficiency fractures associated with osteomalacia. This patient has multiple bones affected.

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