Fig. 3. Histologic slide. (A) Cavernous hemangioma composed of variably sized anastomosing vascular walls was observed at low manification (Hematoxylin and Eosin stain [H&E], ×40). (B) Each vascular wall is lined by flattened endothelial cells (H&E, ×200) (arrowheads). (C) Endothelial cells are positive for CD31 immunohistochemical stain (CD31 IHC, ×200) (arrows).

Int J Thyroidol 2023;16:205-8 https://doi.org/10.11106/ijt.2023.16.2.205

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