CD8A and autoimmune thyroid disease: Recently, Neppl et al. described the histology of a thyroidectomy specimen from a patient with nivolumab-induced thyrotoxicosis and TRAb negativity, which revealed similarities with autoimmune thyroiditis, i.e., a predominance of CD8+ T cells within inflammatory infiltrates, but, also, differences from autoimmune thyroiditis, i.e., chronic thyroid lymphocytic inflammation with granulomas and the destruction of follicles [24].