Graves' hyperthyroidism-related pancytopenia: a case report with literature review

Introduction Occurrence of pancytopenia in patients with untreated hyperthyroidism is extremely rare. To the best of our knowledge, only 30 cases have been reported in the English literature. Accurate diagnosis and appropriate tailored therapy are challenging due to the variegated causes of pancytopenia and the potential hematological toxicity of antithyroid drugs (ATDs). Case report We present a 51-year-old Caucasian man with newly diagnosed Graves' disease showing pancytopenia and liver dysfunction. Although in this context the use of ATDs is still under debate, low-dose methimazole therapy was able to induce resolution of both pancytopenia and liver dysfunction, along with euthyroidism restoration. Conclusion Searching in the English literature for previous studies, we identified only 30 cases worldwide to form our database. A demographic as well as clinical, laboratory, and histopathological analysis was performed. In most cases, the recovery of biochemical euthyroidism through the use of ATDs induced the resolution of pancytopenia (at laboratory and histological levels). Our review provides clinical, laboratory, and histopathological features of Graves's hyperthyroidism-related pancytopenia with a view to improving the knowledge of this rare hematological complication and assisting in the decision-making process regarding therapeutic options.

Automated summary

Pancytopenia in untreated hyperthyroidism is rare, with only 30 reported cases in the English literature. Low-dose methimazole therapy was effective in resolving pancytopenia and liver dysfunction, along with restoring euthyroidism. Further research and analysis are needed to improve understanding and decision-making regarding therapeutic options for this rare hematological complication in Graves' hyperthyroidism.