Figure 5.

Immunohistochemical localization of CD1 in parathyroid adenoma (A) and parathyroid carcinoma (Ca). Whereas the adenoma cells generally showed a weak to moderate staining, parathyroid carcinoma cells displayed a variable immunostaining for CD1: carcinoma cells strongly positive from CD1 varied with only weakly stained tumor cells. Th: Thyroid tissue. Bar: 100 μm.