结果：2例为原发性骨海绵状血管瘤，1例为继发性。

Results: 2 cases showed primary skull bone cavernous hemangioma, and 1 case of secondary.

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骨内海绵状血管瘤是一种良性的骨肿瘤，仅占所有骨肿瘤的1%、颅骨肿瘤的7 - 10%。

Intraosseous cavernous hemangiomas are benign neoplasms which comprise only up to 1% of all osseous tumors and 7-10% of skull tumors.

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