However, our patient tested negative for anti-thyroid antibodies (A-TPO: Anti-Thyroid peroxidase, A-TG: Anti-Thyroglobulin, and A-MC: Anti-Microsome), her cerebrospinal fluid appeared normal, and there were no abnormalities on a thyroid ultrasound scan; therefore, her results did not support the diagnosis of Hashimoto's encephalopathy. This evidence concerns the gene TPO and hereditary elliptocytosis.