Association of Hashimoto’s Thyroiditis and Graves’ Disease: A Case Report and Review of the Literature

Graves’ disease and Hashimoto’s thyroiditis are two common autoimmune diseases. Their association with other autoimmune diseases is not exceptional. However, the co-occurrence of these two diseases is not often described. In this case, report, we describe the observation of a patient who had long been followed for exophthalmos and pretibial myxedema as a sign of thyrotoxicosis. Examination of this patient revealed a clinical picture of clinical and biological hypothyroidism related to Hashimoto’s thyroiditis. This case had made it possible to retain an association between Hashimoto’s thyroiditis and basedowdisease, which is rarely described. This observation underscores the importance of monitoring these patients with autoimmune disease systematically even if there is no clinical manifestation.