PMC9263610_01
Computed tomography (CT) shows a mass from the left subclavian vein and the internal jugular vein to the left brachiocephalic vein.
10.1177_2050313X221109435-fig1.jpg
PMC9263610_01_10.1177_2050313X221109435-fig1.jpg
fig1-2050313X221109435
Contrast-enhanced CT showed a strongly enhanced mass, suggesting an intravascular tumor (Figure 1).
(a) Preoperative view of the tumor (arrow). (b) The tumor is resected and closed with a bovine pericardial patch (arrow).
10.1177_2050313X221109435-fig2.jpg
PMC9263610_01_10.1177_2050313X221109435-fig2.jpg
fig2-2050313X221109435
The defect was closed with a bovine pericardial patch to maintain a tubular shape (Figure 2).
(a) The mass measured about 12 mm x 8 mm. (b) Epithelial-like cells are arranged in a cord-like manner against a fibromyxoma-like substrate. (c) The tumor shows positive staining for CD31. (d) The tumor shows positive staining for factor VIII-related antigen.
10.1177_2050313X221109435-fig3.jpg
PMC9263610_01_10.1177_2050313X221109435-fig3.jpg
fig3-2050313X221109435
Immunohistochemical staining was positive for cluster of differentiation (CD) 31, CD34, and factor VIII-related antigen and was negative for epithelial membrane antigen, alpha-smooth muscle actin, S-100, neurofilament, and human melanoma black-45, indicating the presence of EHE (Figure 3).