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The most common hematological involvement of hypothyroidism is anemia, usually normocytic normochromic, less commonly macrocytic due to a coexisting Vit.B12/folate deficiency or microcytic due to excessive blood loss, especially in women. Some cases of pancytopenia have been reported in hypothyroid patients that resolve with levothyroxine (LT4) therapy.
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Paz‐Ibarra et al. (2024) studied this question.
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