case_images: PMC10643026_01
case_images: (a) Hepatic small vessel neoplasm (HSVN) (H&E stain, 2x magnification). (b) CD34 (IHC stain, 2x magnification). (c, d) Hepatic small vessel neoplasm (HSVN) with infiltration into sinusoids (H&E stain, 10x magnification). (e) Vascular space with flat to mildly enlarged endothelial cells (H&E stain, 20x magnification). (f) Ki-67 (IHC stain, 10x magnification).
case_images: CRIHEP2023-8864977.001.jpg
case_images: PMC10643026_01_CRIHEP2023-8864977.001.jpg
case_images: fig1
case_images: Histologic examination showed vascular lesion, and immunohistochemical stain for CD34 highlights the vessels (Figures 1(a) and 1(b)). The lesion infiltrated into hepatic parenchyma (sinusoids) and was hypercellular (Figures 1(c) and 1(d)). The endothelial cells were mildly enlarged (Figure 1(e)). The Ki-67 is about 3% (Figure 1(f)), higher than expected in a hemangioma but lower than expected in an angiosarcoma, which would be at least 10%.