Question
The pupils of this female smoker were unresponsive to light and accommodation. She had noted weight loss and postural hypotension and was found to have an irregular centimeter-sized nodule in the right middle lobe. A test for which one of the following would most likely lead to the diagnosis?
Calcium-receptor antibody
Parathyroid hormone related protein
Serum ceruloplasmin
Treponema pallidum haemagglutination assay
Anti-Hu antibody
