functionalism
Clinical designation indicating whether a neuroendocrine tumor actively secretes hormones causing clinical symptoms.
Full Definition
Functionalism in neuroendocrine tumor terminology refers to the classification of tumors based on their ability to secrete biologically active hormones in quantities sufficient to produce clinical symptoms or syndromes. Functional neuroendocrine tumors produce specific clinical syndromes such as carcinoid syndrome, Zollinger-Ellison syndrome, insulinoma syndrome, or glucagonoma syndrome, depending on the predominant hormone secreted. Non-functional tumors may still produce hormones detectable biochemically but in insufficient quantities to cause clinical symptoms, or may produce clinically inactive peptides. This distinction is crucial for clinical management, as functional tumors often require specific medical therapy to control hormonal hypersecretion symptoms in addition to standard oncological treatment approaches.
Usage
Usage note: Use 'functional' or 'non-functional' as adjectives; 'functionalism' as the concept of hormone-related symptoms.
In Context
- "The tumor's functionalism was confirmed by elevated gastrin levels and clinical Zollinger-Ellison syndrome." — Clinical assessment
- "Despite positive chromogranin staining, the tumor showed no evidence of functionalism on biochemical testing." — Diagnostic workup