Neuroendocrine Tumors

Neuroendocrine Tumors (NETs) are unusual growths that start in specialized cells called neuroendocrine cells. These cells are found throughout your body, including organs like the pancreas, stomach, intestines, lungs, and skin. Neuroendocrine cells have characteristics of both nerve cells and hormone-producing cells, meaning they can send signals and release hormones into your bloodstream. When a NET develops, these cells can grow uncontrollably and, in some cases, produce excessive amounts of hormones, which can lead to a variety of symptoms. NETs can be benign (non-cancerous) or malignant (cancerous), and their behavior varies widely. The exact cause of most Neuroendocrine Tumors is not fully understood. They are thought to arise from random mutations in the DNA of neuroendocrine cells that cause them to grow abnormally. While these tumors are relatively rare, some cases are linked to inherited genetic syndromes, such as Multiple Endocrine Neoplasia Type 1 (MEN1), Von Hippel-Lindau disease (VHL), or Neurofibromatosis Type 1 (NF1). However, the majority of NETs occur without any identifiable genetic predisposition or clear environmental trigger. Lab tests play a crucial role in diagnosing, monitoring, and managing Neuroendocrine Tumors. Because many NETs produce hormones or other substances, blood and urine tests can detect elevated levels of these markers (such as chromogranin A, serotonin, or specific hormones like insulin or gastrin). These tests help your doctor determine if a NET is present, assess its activity, and evaluate how well treatment is working. Your specific lab results provide essential information that, when combined with imaging scans and biopsies, helps your medical team understand your condition and tailor the most effective treatment plan for you.