Also, most cases of reported adrenal angiosarcoma demonstrate an epithelioid histologic pattern as opposed to a vasoformative
While well-differentiated angiosarcomas typically show vasoformative
characteristics, it is not uncommon that these tumors present with a predominantly (or exclusively) epithelioid appearance (Figure 6, C through F).
Hemangiosarcoma (hemangioendothelioma) is a malignant tumor of endothelial cells which form irregular anastomosing vasoformative
channels occurring most frequently in dogs (Moulton, 1978).
There was no evidence of neoplasia, viral cytopathy, granulomata or vasoformative
Retrospective review of the hematoxylin and eosin (H&E) slides from the previous transurethral curettage showed areas of the tumour with a vasoformative
pattern similar to that identified in the cystoprostatectomy specimen.
The histopathological biopsy report of the excised cervical swelling showed a lesion with lobulated appearance where lobules showed the proliferation of blood vessels lined by plump endothelial cells with occasional mitotic figures suggestive of a vasoformative
tumor [Figure 2].
Tumor exhibited a mixture of vasoformative
features, including intravascular infiltration (Figure 6).
Less than 1% of vasoformative
tumours throughout the body occur in skeletal muscle and 15% of them arise in head and neck musculature.
He felt the term should be used for cellular angiomas in which the unit is the vessel and not the endothelial cell and in which the neoplastic tissue reveals distinctive vasoformative
15,16) It is a vasoformative
malignancy that originates in endothelial cells and occurs most frequently in the skin and superficial soft tissues, although the deep tissues and the viscera have also been affected.
Formal excisional biopsies of multiple satellite neck lesions were consistent with a benign vasoformative
lesion, favouring an ulcerated pyogenic granuloma.