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. 2022 Aug 8;13:961256. doi: 10.3389/fendo.2022.961256

Figure 2.

Figure 2

Histopathological confirmation of ectopic TSHoma. Histopathology (obtained from tumor resection) with hematoxylin and eosin staining (A) showing small irregularly shaped islands of cells separated by fibrovascular stroma beside the bone (dark purple streak). Cells have small amounts of lightly eosinophilic, granular cytoplasm and small–intermediate-sized round nuclei with no mitoses identified. Strong diffuse positive tumor cell staining on immunohistochemistry for TSH is also seen (B).