Euthyroid pretibial myxedema.
Pretibial myxedema is typically associated with clinical hyperthyroidism, diffuse goiter, and ophthalmopathy in patients with Graves' disease. A case of biopsy-proved pretibial myxedema was encountered in a clinically euthyroid woman who had neither diffuse goiter nor exophthalmos. Although serum total and free thyroxine hormone concentrations were normal, the thyroid-stimulating hormone response to thyrotropin-releasing hormone was absent. This case illustrates that pretibial myxedema may present without other more common manifestations of Graves' disease. In patients with suspect pretibial skin lesions, the thyrotropin-releasing hormone stimulation test may be required to establish the presence of subtle underlying thyroid gland autonomy and the diagnosis of euthyroid pretibial myxedema.[1]References
- Euthyroid pretibial myxedema. Chen, J.J., Ladenson, P.W. Am. J. Med. (1987) [Pubmed]
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