LMNA and temporal arteritis: Autoantibodies were not consistently found in GCA, although plasma cells can be found in the adventitia in 7%–24% of temporal artery biopsies from patients with GCA.39 The exception was antiphospholipid antibodies (APLA), which were found in 30%–80% of GCA cases.40–43 Antibodies to lamin C were found in one-third of GCA patients and in none of the controls.44 Autoantibodies to a human ferritin peptide (the heavy chain N-terminal) were found in 92% of 36 patients with GCA and/or PMR.45,46 In addition, 89% had antibodies to bacterial ferritin peptide of Staphylococcus epidermidis.