TG and cyclic hematopoiesis: The fact that our patient had normal TSH does not exclude CH, as 84% of patients with CH have normal TSH values [21] and the combination of a low FT4 and a non-markedly elevated TSH in patients with known pituitary disease is a diagnostic of CH, unless a patient is severely ill and is affected by non-thyroidal illness-induced changes in the thyroid hormone [22].