Orbital venous hemangioma

The name venous hemangioma is rarely seen in orbital disease monographs, because its basic histopathological component is vein clumps with different wall thicknesses, which are often mixed with venous malformations (such as varicose veins). And because the tumor has many highly dilated thin-walled blood vessels, it was diagnosed as cavernous hemangioma by pathologists. Venous hemangioma is more common in Chinese people. The hemangioma classified by the World Health Organization (WHO) includes venous hemangioma, and venous hemangioma is an irregularly shaped medium to large blood vessel. Benign lesions composed of venous blood vessels can be accompanied by scattered smooth muscle fibers and adipose tissue. Intraorbital venous hemangioma has its own characteristics, which is different from those occurring in other parts. Vein diameter is small and there are many fibrous tissues, but basic pathological changes should belong to this category. Such tumors have also been named after angioma. Although hemangioma has arterial, venous, and arterial and venous distinctions, it usually means that arterial and venous coexist, and there is direct communication. Pathological examination revealed that the tumor lacked an envelope, had abundant small veins in a large amount of fibrous tissue, and was sometimes diagnosed as a fibroangioma.

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