“…Its direct relationship with pregnancy and, in some cases, with puberty, allows us to hypothesize a hormonal etiology 1 . The association of gigantomastia with diverse autoimmune diseases, such as myasthenia gravis, 8 systemic lupus erythematosus, 9 rheumatoid arthritis, 10 autoimmune thyroiditis 11 and the presence of autoantibodies, 12 supports the possibility of a role of autoimmunity. Our patient had autoimmune thyroiditis, autoantibodies and a family history of autoimmunity and presented with 1 crisis of the disease related to pregnancy and 2 unrelated to it, which makes us assume a different condition with purely hormonal effects.…”