What percentage of Zollinger-Ellison tumors are malignant?

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Multiple Choice

What percentage of Zollinger-Ellison tumors are malignant?

Explanation:
Zollinger-Ellison tumors, or gastrinomas, are neuroendocrine tumors with a high tendency toward malignant behavior. They frequently metastasize, especially to the liver, and are often advanced at diagnosis. The best-supported estimate for their malignancy is about two-thirds, i.e., around 66%. That’s why 66% is the most appropriate choice. The other percentages either understate or overstate the malignant potential, since not every gastrinoma is benign, but it’s not universal for all to be malignant either.

Zollinger-Ellison tumors, or gastrinomas, are neuroendocrine tumors with a high tendency toward malignant behavior. They frequently metastasize, especially to the liver, and are often advanced at diagnosis. The best-supported estimate for their malignancy is about two-thirds, i.e., around 66%. That’s why 66% is the most appropriate choice. The other percentages either understate or overstate the malignant potential, since not every gastrinoma is benign, but it’s not universal for all to be malignant either.

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