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Pamidronate "zebra lines": A treatment timeline
Avgi Loizidou1, Savvas Andronikou2, Christine P Burren3
1School of Health Sciences, University of Bristol, Senate House, Tyndall Ave, Bristol BS8 1TH, UK.
Radiology Case Reports
|February 28, 2018
Summary
Osteogenesis imperfecta treatment with pamidronate creates visible lines on radiographs. These "pamidronate lines" show treatment timing and can indicate changes in patient condition.
Area of Science:
- Medical Imaging
- Pediatric Endocrinology
- Bone Metabolism
Background:
- Osteogenesis imperfecta (OI) is a genetic disorder causing bone fragility and deformities.
- Pamidronate, a bisphosphonate, is a primary treatment for OI, aimed at reducing bone loss and fractures.
- Radiographic findings in OI patients undergoing pamidronate treatment are not fully characterized.
Observation:
- Pamidronate treatment in OI patients results in distinct radiologic markers known as "pamidronate lines."
- These lines represent sclerosed, non-decalcified cartilage at the metaphysis, correlating with treatment cycles.
- The number and spacing of these lines appear to reflect the treatment timeline.
Findings:
- A treatment timeline can be visualized on plain radiographs by observing the number and spacing of pamidronate lines.
- Pamidronate lines exhibit benign characteristics, migrating and fading with normal bone growth.
- Absence of expected pamidronate lines may signal reduced bisphosphonate efficacy or changes in the patient's condition.
Implications:
- Radiographs can serve as a valuable tool for monitoring pamidronate treatment adherence and effectiveness in OI.
- "Zebra lines" are benign, and their appearance should reassure clinicians.
- Monitoring pamidronate lines can aid in early detection of treatment-related issues or disease progression in osteogenesis imperfecta patients.