Pancreatic Cancer — Diagnosis and Endoscopic Role

What Is Pancreatic Cancer?

Pancreatic cancer is a malignant tumor arising from the cells of the pancreas, a vital organ located behind the stomach that produces digestive enzymes and hormones such as insulin. The most common type is pancreatic ductal adenocarcinoma (PDAC), which accounts for approximately 90% of all pancreatic cancers and originates from the cells lining the pancreatic ducts.

Pancreatic cancer is one of the most challenging cancers to diagnose and treat. Because the pancreas is located deep within the abdomen and symptoms often appear late in the disease course, many patients are diagnosed at an advanced stage. However, advances in endoscopic techniques, imaging, and multidisciplinary care are improving both early detection and the quality of palliative care.

Risk Factors

While the exact cause of pancreatic cancer remains unknown in many cases, several risk factors have been identified:

• Age — most cases occur in patients over 60 years old
• Smoking — the most significant modifiable risk factor, doubling the risk
• Chronic pancreatitis — long-standing inflammation of the pancreas increases risk (pancreatitis)
• Diabetes mellitus — particularly new-onset diabetes in older adults can be an early sign
• Obesity — body mass index over 30 is associated with increased risk
• Family history — approximately 10% of pancreatic cancers have a hereditary component
• Genetic syndromes — BRCA2 mutations, Lynch syndrome, familial atypical multiple mole melanoma (FAMMM), and Peutz-Jeghers syndrome
• Heavy alcohol consumption — primarily through its association with chronic pancreatitis

Symptoms

Symptoms of pancreatic cancer are often vague in the early stages and become more pronounced as the disease progresses:

• Painless jaundice — progressive yellowing of the skin and eyes, particularly common with tumors of the pancreatic head. This is often the symptom that leads to diagnosis.
• Unexplained weight loss — significant and progressive, often accompanied by loss of appetite
• New-onset diabetes — unexplained diabetes developing after age 50, or sudden worsening of previously controlled diabetes, can be an early sign
• Abdominal pain — typically a dull, deep ache in the upper abdomen that may radiate to the back
• Dark urine and pale stools — signs of bile duct obstruction
• Nausea and vomiting — may occur if the tumor obstructs the duodenum
• Steatorrhea — fatty, foul-smelling stools due to pancreatic exocrine insufficiency
• Depression — can precede the diagnosis and may be related to biological factors
• Venous thromboembolism — unexplained blood clots can be a presenting feature

Diagnostic Pathway

A thorough diagnostic workup is essential for accurate staging and treatment planning:

• Blood tests — liver function tests, tumor markers (CA 19-9), blood glucose levels
• CT scan with contrast — the initial imaging study of choice, using a dedicated pancreatic protocol to evaluate the tumor, its relationship to major blood vessels, and distant spread
• Endoscopic Ultrasound (EUS) with FNA biopsy — endoscopic ultrasound is the gold standard for obtaining tissue diagnosis. EUS provides high-resolution images of the pancreas and allows fine-needle aspiration (FNA) or fine-needle biopsy (FNB) to obtain cells for pathological examination. EUS can detect tumors as small as 5-10 mm that may be missed by CT.
• ERCP — ERCP is primarily used therapeutically in pancreatic cancer for biliary stent placement to relieve jaundice. Biliary brushings can also be obtained during ERCP for cytological analysis.
• MRI/MRCP — complementary imaging to further characterize the tumor and biliary anatomy
• PET-CT — may be used to evaluate for distant metastatic disease

The Role of Endoscopy in Pancreatic Cancer

Interventional endoscopy plays a crucial role in multiple aspects of pancreatic cancer management:

• Tissue diagnosis — EUS-guided FNA/FNB provides definitive histological diagnosis with high accuracy and minimal invasiveness
• Biliary decompression — ERCP with stent placement relieves obstructive jaundice, improving liver function, nutritional status, and quality of life before surgery or chemotherapy
• Celiac plexus neurolysis (CPN) — EUS-guided injection of the celiac plexus can provide significant pain relief for patients with unresectable tumors experiencing severe abdominal or back pain
• Gastric outlet obstruction management — endoscopic placement of duodenal stents can restore oral intake in patients with tumor-related gastric outlet obstruction

Multidisciplinary Approach

Pancreatic cancer management requires a coordinated team of specialists including gastroenterologists, surgical oncologists, medical oncologists, radiation oncologists, radiologists, pathologists, pain management specialists, nutritionists, and psychologists. Each case is discussed in a multidisciplinary tumor board to determine the optimal treatment strategy.

Treatment Overview

Surgery

Surgical resection (Whipple procedure, distal pancreatectomy) offers the only potential for cure and is possible in approximately 15-20% of patients at diagnosis. Neoadjuvant (preoperative) chemotherapy is increasingly used to improve surgical outcomes.

Chemotherapy

Systemic chemotherapy is the mainstay of treatment for both resectable and unresectable disease. Modern regimens (FOLFIRINOX, gemcitabine/nab-paclitaxel) have improved survival outcomes. Adjuvant chemotherapy after surgery reduces the risk of recurrence.

Palliative Care

For patients with advanced disease, palliative care focuses on symptom management and quality of life. This includes biliary stenting for jaundice, pain management (including EUS-guided celiac plexus neurolysis), nutritional support with pancreatic enzyme replacement, and psychological support.

Information for Patients and Families

A diagnosis of pancreatic cancer can be overwhelming. Here are important points to remember:

• Seek care at a center experienced in managing pancreatic cancer
• Ask about clinical trials, which may provide access to new treatments
• Nutritional support and pancreatic enzyme supplementation are essential components of care
• Pain management should be proactive — effective treatments are available
• Psychological support for both patients and caregivers is an integral part of comprehensive care
• Support groups and patient organizations can provide valuable resources and community

When to Seek Medical Attention

Consult a gastroenterologist promptly if you experience:

• Unexplained jaundice (yellowing of the skin or eyes)
• Persistent, unexplained abdominal or back pain
• Significant unintentional weight loss
• New-onset diabetes after age 50 without clear risk factors
• A family history of pancreatic cancer (consider genetic counseling and potential screening)

Early evaluation of concerning symptoms is essential, even though many of these symptoms can have benign causes.