Although assays to detect thyroid autoantibodies have been available for mo
re than 40 years, their place in the clinical management of thyroid disease
has remained controversial; however, novel automated detection techniques
using recombinant antigens are increasing the sensitivity and specificity o
f the assays, particularly for antibodies to the TSH receptor. In addition,
new antigenic targets have been defined including the sodium-iodide sympor
ter and four eye muscle proteins targeted in Craves' ophthalmopathy. This a
rticle summarizes the immunobiology, assay methodology and prevalence in th
yroid diseases of each of the major thyroid autoantibodies before discussin
g the clinical indications fo; their use in thyroid diseases.