胰头肿块涉及多种病变，因此诊断胰头实性肿块确切的性质十分辣手。

There are various pathologies which can present as a pancreatic head tumor.

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脊椎硬膜外血管瘤在MRI上表现多样，但共同的特点（不管其组织病理类型）包括分叶状轮廓，T2序列上低信号环，实性的富血供病变。

Spinal epidural hemangiomas can have various MR features, but common features (despite histopathologic type) include lobular contour, a rim of low T2 signal intensity, and solid hypervascularity.

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