Neuroendocrine Tumors (NETs)
Videos
Overview
Neuroendocrine tumors (NETs) are rare growths that develop from hormone‑producing cells found throughout the digestive tract and pancreas. NETs may be functional (producing hormones that cause symptoms) or non‑functional, often discovered incidentally on imaging. Symptoms vary widely and may include abdominal pain, diarrhea, flushing, or weight loss. NETs range from slow‑growing tumors to more aggressive forms. Treatment depends on tumor location, hormone activity, and stage, and may include surgery, medical therapy, or targeted treatments.
Causes
Most NETs occur sporadically, but some are linked to genetic syndromes such as MEN1, NF1, or VHL. Abnormal growth of neuroendocrine cells leads to tumor formation, with behavior ranging from indolent to aggressive.
Risk Factors
Risk factors include family history of NETs, genetic syndromes (MEN1, NF1, VHL), chronic inflammation, and certain hereditary cancer conditions. Many cases occur without identifiable risk factors.
How Neuroendocrine Tumors Affect the Body
Functional NETs may produce excess hormones, causing symptoms such as flushing, diarrhea, or low blood sugar. Non‑functional NETs may cause abdominal pain, bleeding, or obstruction as they grow.
Complications
Complications include hormonal crises, bowel obstruction, bleeding, liver metastases, and nutritional deficiencies.
Symptoms & Signs
Symptoms depend on tumor type and may include abdominal pain, diarrhea, flushing, nausea, weight loss, fatigue, or symptoms of hormone excess such as palpitations or low blood sugar.
Diagnosis
Diagnosis includes CT or MRI imaging, endoscopic ultrasound (EUS), PET/CT (DOTATATE), hormonal blood tests, and biopsy. Genetic testing may be recommended for certain patients.
Differential Diagnosis
Includes IBS, gastritis, pancreatic tumors, GIST, carcinoid syndrome, and functional GI disorders.
Lifestyle Modifications
Patients may benefit from eating smaller meals, avoiding foods that trigger flushing or diarrhea, managing stress, and maintaining a healthy weight. These changes support overall health but do not replace medical treatment.
Treatment Options
Treatment depends on tumor location, hormone activity, and stage. Options include minimally invasive surgical removal, somatostatin analogs, targeted therapy, peptide receptor radionuclide therapy (PRRT), and systemic therapy for advanced disease.
When to See Doctor
Seek evaluation if you experience persistent abdominal pain, flushing, diarrhea, unexplained weight loss, or symptoms of hormone imbalance.
When to Seek Treatment
Treatment is recommended when imaging or biopsy confirms a NET, when symptoms suggest hormone excess, or when tumors cause pain or obstruction.
Long-Term Outlook
Long‑term outcomes depend on tumor biology and response to therapy. Regular imaging and hormonal monitoring are essential for ongoing care.
Prognosis
Prognosis varies widely depending on tumor grade, location, and stage. Many NETs grow slowly and respond well to treatment, especially when detected early.
Why Choose Dr. de la Cruz‑Muñoz
Dr. Nestor de la Cruz‑Muñoz provides expert evaluation and minimally invasive surgical management of neuroendocrine tumors, offering precise tumor removal, reduced recovery time, and excellent long‑term outcomes.
