Fig. 3
From: Giant cell tumor of soft tissue involving thyroid gland: a case report and review of the literature
Immunohistochemical staining characteristics of thyroid giant cell tumor of soft tissue. A The tumor cells are negative for AE1/AE3 by immunohistochemical staining. B Immunostaining for CD68 is diffusely strong positive in multicellular cells. The mononuclear cells demonstrate reactivity for SYN C and the proliferation marker Ki-67 D mainly existed in the mononuclear cells (IHC staining, 100×)