13.20 Pancreas
13.20 Pancreas.
A. Carcinoma (except islet cell carcinoma).
OR
B. Islet cell carcinoma that is inoperable or unresectable and physiologically active.
Islet (pronounced eye-let) cell carcinoma is rare and may either be functional (physiologically active) or non-functional.
Functional (physiologically active) islet cell tumors produce different clinical manifestations depending on the type of hormone it produces in excess.
If it is unclear whether the tumor is physiologically active, contact the treating source.
Keep in mind that to meet Listing 13.20 B, the islet cell tumor must be physiologically active and either inoperable (surgery is of no therapeutic value or cannot be performed due to risk to the patient) or unresectable (operation was performed but all of the tumor could not be removed).

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