A 42–year‐old woman with long‐standing psoriasis developed arthralgias and stiffness after 1 year of etretinate therapy. There was no clinical or radiological evidence of psoriatic arthropathy, but X‐rays demonstrated hyperostosis of the thoraco‐lumbar spine. Her symptoms resolved on discontinuing etretinate therapy.
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PAPASAVVAS et al. (1987) studied this question.
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