Gastroenteropancreatic neuroendocrine tumour disease affects the digestive system and pancreas, forming from cells that produce hormones. These tumours can develop anywhere along the gut, from the stomach through to the rectum, as well as in the pancreas, and they often grow slowly over many years.

Understanding Your Prognosis

When you’re told you have gastroenteropancreatic neuroendocrine tumour disease, it’s natural to wonder what the future holds. The outlook for this condition varies considerably depending on several factors, including where the tumour started, how advanced it is when discovered, and how quickly it grows^[3]. Understanding your individual situation can help you and your healthcare team make informed decisions together.

Many people with gastroenteropancreatic neuroendocrine tumours live with their condition for many years. In fact, research shows that on average, people diagnosed with these tumours can survive for 27 years after diagnosis^[12]. This is significantly longer than many other types of digestive system cancers. However, this average includes people at all stages of disease, and your personal prognosis depends heavily on your specific circumstances.

The stage at which your tumour is found makes a tremendous difference. Tumours caught early, when they’re small and haven’t spread beyond their original location, generally have the most favourable outcomes^[12]. The grade of your tumour—which measures how quickly the cells are dividing—also plays an important role. Low-grade tumours, where cells divide slowly, tend to progress more gradually than high-grade tumours^[3].

Where your tumour started also influences your outlook. Tumours in the small intestine and rectum that are caught at low stages and grades often have the longest survival times^[12]. Different parts of the digestive system have different characteristics that affect how tumours behave. For example, midgut tumours, which arise from the small intestine, are often slow-growing but have a tendency to spread^[11].

It’s worth noting that the number of people diagnosed with gastroenteropancreatic neuroendocrine tumours has increased dramatically over recent decades. Between 1973 and 2004, the incidence rose more than 400 percent^[3]. This increase is largely due to better detection methods, such as improved imaging technology and more widespread use of endoscopic procedures, rather than the disease becoming more common^[12]. Early detection means more people are being diagnosed when their tumours are at earlier, more treatable stages.

Research also shows that socioeconomic factors can affect survival outcomes. People with higher incomes and those with private insurance or Medicare tend to have better outcomes than those with Medicaid or no insurance^[12]. This highlights the importance of access to healthcare and proper treatment, which we’ll discuss more in the section on family support.

How the Disease Progresses Without Treatment

If gastroenteropancreatic neuroendocrine tumours are left untreated, they will continue to grow, though often at a slower pace than many other cancers. Most of these tumours are slow-growing, sometimes taking many years to develop to the point where they cause symptoms^[5]. However, their growth pattern doesn’t mean they should be ignored—untreated tumours can eventually cause serious health problems.

As the tumour grows at its original site, it can begin to interfere with the normal function of the organ where it started. For example, a tumour in the small intestine might block the passage of food, leading to pain, bloating, and changes in bowel habits. A tumour in the pancreas might affect the production of digestive enzymes or hormones that control blood sugar^[2].

Some gastroenteropancreatic neuroendocrine tumours are functional, meaning they produce and release excess amounts of hormones^[2]. Without treatment, these hormone-producing tumours will continue to flood your body with these substances, causing increasingly severe symptoms. For instance, an insulinoma releases too much insulin, leading to dangerous drops in blood sugar that can cause confusion, weakness, and even unconsciousness. A gastrinoma produces excess gastrin, resulting in severe stomach ulcers and persistent diarrhea^[5].

Over time, untreated tumours can spread beyond their original location. They may invade nearby tissues or travel through the bloodstream or lymphatic system to distant parts of the body. The liver is a common site for these tumours to spread, particularly for those that started in the digestive tract^[4]. Tumours can also spread to the lungs or bones. Once spread occurs, the disease becomes more difficult to treat and symptoms become more complex.

The rate of progression varies considerably. Some gastroenteropancreatic neuroendocrine tumours remain stable for years with minimal growth, while others, particularly high-grade tumours, can progress more rapidly^[3]. The unpredictable nature of the disease underscores the importance of regular monitoring and appropriate treatment, even when symptoms are mild or absent.

Possible Complications

Gastroenteropancreatic neuroendocrine tumours can lead to various complications, some related to the tumour itself and others arising from the hormones it may produce. Understanding these potential problems can help you and your healthcare team watch for warning signs and respond quickly when issues develop.

One of the most significant complications is the spread of cancerous tumours to other parts of your body, a process called metastasis. The most common sites for spread are the liver, lungs, and bones^[4]. When tumours reach the liver, they can interfere with this vital organ’s ability to filter blood and produce essential proteins. Liver involvement often causes the skin and whites of the eyes to turn yellow, a condition called jaundice, along with pain in the upper right abdomen^[2].

For people with functional tumours that produce hormones, carcinoid syndrome is a common and distressing complication. This syndrome occurs when hormone-producing tumours, particularly those that have spread to the liver, release large amounts of substances like serotonin into the bloodstream^[5]. Symptoms include uncomfortable flushing of the face and neck, severe watery diarrhea, wheezing, and rapid heartbeat. In rare cases, carcinoid syndrome can progress to a life-threatening condition called carcinoid crisis, which requires emergency medical attention.

Some tumours can block parts of the digestive system. A tumour in the small intestine, for example, might grow large enough to obstruct the passage of food, causing severe abdominal pain, vomiting, and inability to have bowel movements. This type of obstruction requires urgent medical intervention. Similarly, tumours in the pancreas can block bile ducts, preventing the normal flow of digestive fluids and causing pain, jaundice, and digestive problems^[2].

Hormone-related complications can be particularly troublesome. An insulinoma that produces too much insulin can cause dangerously low blood sugar levels, leading to confusion, sweating, rapid heartbeat, and in severe cases, seizures or loss of consciousness^[5]. A gastrinoma that produces excess gastrin can lead to multiple stomach ulcers that don’t respond to standard treatments, causing persistent pain and potentially dangerous bleeding.

Nutritional problems are another concern. Tumours in the pancreas or small intestine can interfere with the body’s ability to digest and absorb nutrients from food. This can lead to weight loss, vitamin deficiencies, and a condition called fat malabsorption, where the body cannot properly process dietary fats^[18]. People with this problem often pass pale, foul-smelling stools that float in the toilet.

Some people experience severe, chronic diarrhea, which can lead to dehydration, electrolyte imbalances, and significant disruption to daily life. This is particularly common with functional tumours that produce certain hormones^[18]. The constant need to be near a bathroom can make work, social activities, and even leaving the house extremely challenging.

Impact on Daily Life

Living with gastroenteropancreatic neuroendocrine tumours affects much more than just your physical health. The disease and its symptoms can reshape many aspects of your daily life, from your energy levels and eating habits to your emotional wellbeing and relationships with others.

Physical symptoms can be exhausting and unpredictable. Fatigue is extremely common and can make it hard to complete everyday tasks that once felt effortless^[2]. You might find yourself needing frequent rest breaks or unable to work full days. Diarrhea, another frequent symptom, can be particularly disruptive. The urgent need for bathroom access can make you hesitant to leave home, attend social events, or participate in activities you once enjoyed^[18]. Planning outings becomes a matter of mapping out bathroom locations in advance.

Eating can become complicated and sometimes stressful. If you have a functional tumour or experience carcinoid syndrome, certain foods and drinks can trigger uncomfortable symptoms^[17]. You might need to avoid aged cheeses, chocolate, red wine, smoked meats, and other foods high in compounds called amines, which can worsen flushing, diarrhea, and other symptoms. Meals that were once sources of pleasure may now require careful planning and restriction. Some people also experience loss of appetite or nausea, making it difficult to maintain adequate nutrition and a healthy weight^[18].

Weight changes can be frustrating and emotionally difficult. You might lose weight even when eating normally because your body isn’t absorbing nutrients properly, or because the tumour is affecting your metabolism^[18]. Friends and family members may frequently comment on your weight loss, which, though often well-intentioned, can add to your stress. On the other hand, some people gain weight due to changes in hormone levels or reduced activity.

Work life often requires adjustments. Depending on your symptoms and treatment schedule, you might need to reduce your hours, take extended leave, or modify your job duties. The unpredictability of symptoms like sudden flushing or urgent diarrhea can make it difficult to maintain a regular work routine. Some people worry about disclosing their diagnosis to employers, while others find that openness helps them access needed accommodations.

The emotional toll of living with gastroenteropancreatic neuroendocrine tumours can be substantial. It’s completely normal to experience a range of feelings including shock, fear, anger, sadness, and anxiety^[15]. You might feel overwhelmed by medical appointments, test results, and treatment decisions. Some days you may feel numb or find it difficult to believe you have cancer at all. These reactions are a natural part of adjusting to life with a serious illness.

Relationships can be affected in unexpected ways. Some friends or family members might not know how to talk about your illness and may withdraw, which can feel isolating^[15]. Others might become overly involved or offer unwanted advice. Partners may struggle with fear of loss or uncertainty about the future. Open communication about your needs and feelings can help maintain strong connections with loved ones.

Many people find that gastroenteropancreatic neuroendocrine tumours are difficult for others to understand because they’re rare and complex. Unlike more common cancers, many people haven’t heard of these tumours, which can make you feel like you’re constantly explaining your condition. The slow-growing nature of many of these tumours can also confuse people—friends might not understand why you need ongoing treatment and monitoring if the cancer appears stable.

Despite these challenges, many people develop effective coping strategies. Some find strength in learning everything they can about their condition, while others prefer to focus on day-to-day living rather than medical details^[15]. Regular exercise, even gentle activities like walking, can help maintain energy and improve mood^[21]. Setting small, achievable goals and planning enjoyable activities can help maintain a sense of normalcy and purpose.

Many people describe their experience with gastroenteropancreatic neuroendocrine tumours as similar to living with a chronic illness rather than acute cancer. Because these tumours often grow slowly and can be managed for many years, you may need to find ways to live well alongside the disease rather than putting life on hold until treatment is complete^[6]. This perspective can be both challenging and empowering, requiring you to balance medical care with maintaining quality of life.

Support for Family Members

If someone you love has been diagnosed with gastroenteropancreatic neuroendocrine tumours, you play a vital role in their journey. Family members and close friends often want to help but may feel uncertain about what to do or say. Understanding clinical trials and treatment options, learning how to provide practical support, and taking care of your own wellbeing are all important aspects of being there for someone with this condition.

Clinical trials are research studies that test new treatments or approaches to managing gastroenteropancreatic neuroendocrine tumours. They represent important opportunities for patients to access cutting-edge therapies that aren’t yet widely available. However, navigating the world of clinical trials can feel overwhelming. As a family member, you can help by learning the basics about how trials work and what participation involves.

Clinical trials for gastroenteropancreatic neuroendocrine tumours may test new medications, combinations of existing treatments, or novel approaches like targeted therapies or immunotherapy^[3]. Some trials focus on improving symptom management or quality of life rather than directly treating the tumour. Understanding that clinical trials have eligibility requirements—specific criteria about tumour type, stage, previous treatments, and overall health—can help you and your loved one determine which trials might be appropriate.

You can assist with finding clinical trials by searching online databases together or asking the medical team about available studies. Many major cancer centers maintain lists of active trials. Help your loved one prepare for conversations with their doctor about trial options by writing down questions in advance. Important questions include: What is the purpose of this trial? What are the potential benefits and risks? How might the trial affect daily life? What happens if the treatment doesn’t work?

If your loved one decides to participate in a trial, you can provide practical support in many ways. Offer to accompany them to appointments, as having a second person present can help remember information and ask questions the patient might not think of. Keep organized records of appointments, test results, and medication schedules. Help track any side effects or symptoms that need to be reported to the research team.

Beyond clinical trials, supporting someone through treatment and daily life with gastroenteropancreatic neuroendocrine tumours involves both practical and emotional help. Transportation to medical appointments is often needed, especially on days when treatments cause fatigue or discomfort. Preparing meals that accommodate dietary restrictions can make a real difference, particularly if certain foods trigger symptoms^[18].

Help with household tasks like cleaning, shopping, or yard work can relieve physical and mental burden when your loved one is dealing with symptoms or recovering from treatment. Simply being present and willing to listen without trying to fix everything can be incredibly valuable. Let them express their fears, frustrations, and hopes without judgment.

Sometimes the best support is helping your loved one maintain a sense of normalcy. Encourage participation in activities they enjoy when they feel up to it. Don’t treat them as if they’re fragile or defined solely by their illness. Respect their wishes about how much they want to talk about their condition—some people find it helpful to discuss their situation frequently, while others prefer to focus on other topics.

Be aware that practical challenges may arise. Insurance coverage, financial concerns, and navigating the healthcare system can be stressful^[12]. Research has shown that having adequate insurance and financial resources can actually affect outcomes, making it even more important to help your loved one access all available resources. Look into patient assistance programs, support organizations, and financial counseling services offered by cancer centers.

Taking care of yourself is not selfish—it’s essential. Supporting someone with gastroenteropancreatic neuroendocrine tumours can be emotionally and physically draining. You may experience your own feelings of fear, helplessness, anger, or grief. These emotions are normal and valid. Consider joining a support group for caregivers or seeking counseling for yourself. Maintain your own health through adequate sleep, nutrition, and exercise. Accept help from others so you don’t become overwhelmed.

Remember that you cannot control the disease or its progression. What you can control is showing up with love, patience, and practical assistance. Your presence and support can make an enormous difference in your loved one’s ability to cope with their diagnosis and maintain quality of life throughout their journey with gastroenteropancreatic neuroendocrine tumours.