PMC5684558_01
Grossly, the tumor had a pearly-white appearance and was well circumscribed, focally calcified with hemorrhagic alterations.
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fig1
Grossly, the submandibular lesion, 3 x 2 x 1 cm in size, was well circumscribed, firm, and focally calcified and had a pearly-white appearance with multifocal hemorrhagic areas on the cut surface (Figure 1).
Fusocellular proliferation encapsulated by a thick fibrous capsule compressing the nodal tissue (HE, 100x).
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fig2
Microscopic examination revealed a fusocellular proliferation encapsulated by a thick fibrous capsule (Figure 2).
The lesion contains hemosiderin pigments (HE, 400x).
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fig3
Otherwise, hemorrhagic alterations and hemosiderin pigment were present (Figure 3).
Acellular material accumulation with homogeneous eosinophilic appearance called "amianthoid fibers" (HE, 100x).
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fig4
A striking feature was the presence of satellite areas of homogeneous and eosinophilic deposits identical to those previously described as "amianthoid fibers" (Figure 4).
The spindle cells were diffusely immunoreactive for SMA.
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fig5
Immunohistochemical stains showed a strong immunoreactivity for vimentin and Smooth Muscle Actin (SMA) (Figure 5).