Management of Neuroendocrine Tumors: Current and Future Therapies

Kjell E Öberg


Expert Rev Endocrinol Metab. 2011;6(1):49-62. 

In This Article

Nonfunctioning NETs

Nonfunctioning NETs are not associated with a distinct hormonal syndrome so are more difficult to detect than functioning NETs; owing to this, patients generally present late with large primary tumors and advanced disease. However, nonfunctioning NETs may secrete bioactive hormones or amines at subclinical levels, or secrete compounds that lead to other, still under-recognized hormonal syndromes. They can also cause nonspecific symptoms related to increased tumor mass and/or metastases such as weight loss, bleeding or abdominal pain.[5]


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