This story is from August 31, 2025

Appendix cancer on the rise: Understanding symptoms, causes, types, and more

Appendix cancer on the rise: Understanding symptoms, causes, types, and more
Appendix cancer, also called appendiceal cancer, is a rare condition that starts in the appendix, a small pouch attached to the large intestine. For decades, it was considered extremely uncommon and often discovered only by chance, either during surgery for appendicitis or through scans performed for unrelated health issues. In recent years, however, reported cases seem to be increasing. Experts believe this rise may not only reflect advances in imaging and greater diagnostic awareness, but also potential influences from lifestyle choices, genetic predisposition, and environmental exposures. Raising awareness about this rare cancer is vital, as understanding its risk factors and early warning signs can play a critical role in timely detection and effective treatment.

What is appendix cancer

Appendix cancer, also known as appendiceal cancer, occurs when abnormal cells in the appendix begin to grow uncontrollably, forming a tumour. These tumours can be benign (non-cancerous) or malignant (cancerous). Malignant tumours have the potential to spread within the abdomen or to other organs. It is extremely rare, affecting fewer than 1 in a million people each year, yet the StatPearls review on appendix cancer reports a steady rise in its incidence, partly due to improved detection and awareness. Although still uncommon, understanding appendix cancer is essential, as its symptoms can easily mimic more familiar abdominal conditions


Symptoms of appendix cancer

Many patients with appendix cancer show no early symptoms, which makes detection difficult. However, as the tumour grows, the following signs may appear:
  • Sudden pain and swelling due to appendicitis
  • Abdominal bloating or swelling
  • Ascites (fluid build-up in the abdomen)
  • Increase in waist size without weight gain
  • Persistent abdominal or pelvic pain
  • Nausea and vomiting
  • Changes in bowel habits (diarrhoea or constipation)
  • Early satiety (feeling full quickly)
In some cases, appendix cancer leads to a condition called pseudomyxoma peritonei (PMP), where mucin (a jelly-like fluid) builds up in the abdomen, causing bloating and discomfort.

Causes and risk factors

The exact cause of appendix cancer is unknown. However, research suggests certain risk factors may play a role:
  • Age: Most common between ages 40 and 60
  • Sex: Slightly more common in women (or certain types)
  • Smoking: Increases general cancer risk
  • Medical history: Conditions like atrophic gastritis, pernicious anaemia, or Zollinger-Ellison syndrome
  • Family history: Genetics may contribute, though evidence is still limited


Types of appendix cancer

Doctors classify appendix tumours into two main groups: epithelial tumours and neuroendocrine tumours.1. Appendiceal Adenocarcinomas (Epithelial Tumours)These cancers start in the glandular tissue lining the appendix. Subtypes include:
  • Mucinous adenocarcinoma – produces mucin, which can spread inside the abdomen.
  • Colonic-type adenocarcinoma – resembles colon cancer, often found at the base of the appendix.
  • Signet ring cell adenocarcinoma – very rare and aggressive.
  • Goblet cell adenocarcinoma – has features of both adenocarcinoma and neuroendocrine tumours.
2. Neuroendocrine Tumours (Carcinoid Tumours)These start in hormone-producing cells of the appendix. They are often slow-growing and discovered incidentally during appendectomy surgery.


Stages of appendix cancer

Staging helps determine how advanced the cancer is. Doctors use the TNM system:1. T (Tumour): Size and depth of tumour in the appendix2. N (Nodes): Spread to nearby lymph nodes3. M (Metastasis): Spread to other organsStages range from Stage I (localised tumour) to Stage IV (advanced cancer that has spread to distant organs).


Prevention tips

Because appendix cancer is so rare and its exact causes remain unclear, there are no guaranteed ways to prevent it. However, experts recommend adopting general cancer-prevention strategies that may reduce overall risk:
  • Quit smoking: Tobacco increases the risk of many cancers, including rare ones.
  • Maintain a healthy diet: A balanced diet rich in fruits, vegetables, and fibre supports digestive health and may lower cancer risk.
  • Exercise regularly: Physical activity helps maintain a healthy weight, which is linked to lower cancer risk overall.
  • Limit alcohol consumption: Excessive drinking can raise the risk of gastrointestinal cancers.
  • Manage medical conditions: Properly treat and monitor chronic digestive or hormonal conditions that may increase risk.
  • Know your family history: If cancer runs in your family, discuss genetic screening or additional monitoring with your healthcare provider.
  • Seek timely care: Report persistent abdominal symptoms, such as bloating, unexplained pain, or changes in bowel habits, to a doctor for early evaluation.
While prevention may not always be possible, healthy lifestyle choices combined with prompt medical attention can improve early detection and outcomes.Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making any changes to your health routine or treatment.Also read | Diabetes warning! Excessive thirst could be the silent symptom you are missing

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