CD79A and thyroid cancer: Elevated serum IgA levels have been reported in 50% to 70% of patients with HSP, but these elevations are not specific.[27] Considering that the patient had undergone subtotal thyroidectomy for thyroid cancer 3 weeks earlier, the abnormalities in the aforementioned markers may also be attributed to a postoperative hypercoagulable state and coagulation factor deficiency.