Surveillance for skeletal toxicity of children treated with etretinate

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Abstract
Following recent reports of the development of skeletal abnormalities in patients treated with etretinate (Tigason), we have examined 19 children and adolescents on long-term treatment with etretinate, using 99m technetium methylene diphosphonate (99mTcMDP) whole body bone scans and musculoskeletal assessment. No significant bony abnormalities were detected. We believe that the available evidence does not warrant alarm, and that long-term etretinate therapy can probably be given with a low risk of musculoskeletal toxicity if certain precautions are taken, in particular the use of low maintenance dose levels, early investigation of symptoms of musculoskeletal pain or stiffness, and regular 99mTcMDP bone scans.

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