Figure 3.

Immunohistochemical analysis of β-catenin. Immunostaining of 84 parathyroid adenomas with an anti-β-catenin goat polyclonal antibody. The first 9 tumor specimens, of which 3 were described previously [10], displayed CTNNB1 homozygous stabilizing mutation S37A. No staining was seen in the absence of primary antibodies (last 4 specimens).