Non-functional islet cell tumors have what percentage of malignancy according to the source?

Non-functional islet cell tumors have what percentage of malignancy according to the source?

• A. 90%
• B. 10%
• C. 50%
• D. 100%

Answer: (A)

Non-functional pancreatic neuroendocrine (islet cell) tumors have a high tendency to be malignant because they don’t produce hormones that would trigger early symptoms and investigation. As a result, these tumors often grow silently until they are large or spread, leading to a high rate of malignancy. The source notes that about 90% of non-functional islet cell tumors are malignant, reflecting their tendency for late detection and metastatic spread. Functional tumors, by contrast, usually present earlier due to hormone-related symptoms and tend to have a lower malignancy rate.

Non-functional pancreatic neuroendocrine (islet cell) tumors have a high tendency to be malignant because they don’t produce hormones that would trigger early symptoms and investigation. As a result, these tumors often grow silently until they are large or spread, leading to a high rate of malignancy. The source notes that about 90% of non-functional islet cell tumors are malignant, reflecting their tendency for late detection and metastatic spread. Functional tumors, by contrast, usually present earlier due to hormone-related symptoms and tend to have a lower malignancy rate.