Introduction

Peptic Ulcer Disease (PUD) happens due to the presence of one or more ulcerative lesions that extend into the inner lining of the gastrointestinal tract (GI). These ulcerative lesions are usually found in the stomach and proximal duodenum. However, it may involve other sites, such as the lower oesophagus, distal duodenum, or jejunum.

Pancreatitis, by definition, is the inflammation of the pancreas, which has both exocrine and endocrine functions. It can be further categorised into acute pancreatitis or chronic pancreatitis, which have different pathophysiologies.

Both PUD and pancreatitis are regarded as global problems. In PUD, it is estimated to have a lifetime risk of development of approximately 5-10%.¹,² Although modernisation has allowed a reduction in the incidents of PUD and Pancreatitis global risk still remains. Therefore, it is essential for us to understand these GI conditions.

A peptic ulcer is a defect that happens in the gastric or duodenal mucosa with a diameter of at least 0.5 cm and with the lesion extending into the muscularis mucosae (a thin layer of the smooth muscle). The ulcers are differentiated based on their location, which includes:

• Duodenal Ulcer - involves the duodenal mucosa. It is commonly located on the anterior or posterior wall of the duodenal bulb;
• Gastric Ulcer - involves the gastric mucosa. Commonly located along the lesser curvature usually the site between the antrum and corpus of the stomach.

Peptic Ulcer Disease can be caused by certain factors, such as infections, acid hypersecretory states, medications, and others. However, the two main reasons for the development of PUD are non-steroidal anti-inflammatory drugs (NSAIDs) usage and Helicobacter pylori infections, which are caused by the bacteria Helicobacter pylori (H. pylori) Studies show that prolonged usage of NSAIDs is associated with a fourfold risk of developing PUD.³ On the other hand, it is shown that Helicobacter pylori infections are responsible for 40-70% of duodenal ulcers⁴ and 25-50% of gastric ulcers.⁵ Certain risk factors, such as diet, psychological factors (stress, anxiety, and PTSD), and genetic factors, also increase the likelihood of developing PUD. Up to 70% of patients with PUD are asymptomatic,⁶ while those who suffer from PUD usually report symptoms of:

• Epigastric pain (the most common symptom)
  • Pain increases shortly after eating (like a peptic ulcer).
  • Pain is relieved with food intake (like a duodenal ulcer).
• Nausea or vomiting
• Belching
• Indigestion
• Bloating

Similarities and differences 

As mentioned, pancreatitis is differentiated into acute or chronic pancreatitis. Acute pancreatitis occurs due to pancreatic duct and acinar injuries. Inside the pancreas are digestive enzymes, and if those enzymes are not secreted correctly, there will be increased proteolytic and lipolytic enzyme activity in the pancreas, leading to pancreatic autodigestion and inflammation. Meanwhile, chronic pancreatitis is caused by repeated acute injuries to the pancreas. As a result, it undergoes fibrosis, leading to chronic pancreatitis. The main causes of pancreatitis 

Both acute and chronic pancreatitis share certain symptoms, such as epigastric pain. Unlike most GI disorders, the pain radiates to the back and is often relieved by leaning forward. In acute pancreatitis, symptoms such as nausea, vomiting, and fever are present. Since chronic pancreatitis is exposed to repeated injury, symptoms of pancreatic insufficiency are prominent, such as steatorrhea, malabsorption, weight loss, and even pancreatic diabetes. 

Pancreatitis and PUD can both cause abdominal discomfort and affect the GI system if left untreated. Since both are part of the digestive system. They share certain clinical manifestations, such as abdominal pain, especially in the epigastric region, nausea, and vomiting. They also share certain risk factors, especially medications, infections, and alcohol, which can increase the chances of obtaining either of the conditions. However, they do have certain differences that set them apart. For example, the site of the problem. Despite both of them being part of the digestive system, pancreatitis affects the pancreas, while PUD affects the stomach. Furthermore, their pathophysiology is different as well; PUD is caused by an ulcer that extends to the smooth muscle layer, whereas pancreatitis is caused by inflammation of the organ itself, eventually leading to organ dysfunction.

Diagnostic strategies

Since both pathophysiologies differ, the diagnostic approach is different as well. In PUD, the approach is to find out the cause of the discomfort. Testing for H. pylori and screening for aetiologies such as prolonged NSAIDs use are routinely done to identify the risk of PUD. If the likelihood of PUD is high, an esophagogastroduodenoscopy (EGD), a procedure for diagnosis that includes visualisation of the stomach and duodenum,9 is done to look for the ulcer and confirm the diagnosis. Furthermore, EGD can be useful to rule out other diseases as well, such as malignancies, and allow biopsy if deemed necessary. On the other hand, the diagnostic strategy for pancreatitis is focused on looking for signs of enzyme dysregulation in acute cases. Enzymes such as amylase and lipase 10 are commonly used to look for signs of acute pancreatitis. This can be difficult for chronic pancreatitis, as it may have normal levels. Instead, imaging modalities, especially ultrasound, are routinely used to look for signs or clues of pancreatic destruction. Both PUD and pancreatitis focus on determining the cause of the disease. However, PUD’s diagnostic approach relies more on monitoring the site of the ulcer and making sure that complications such as perforation are avoided, whereas pancreatitis focuses on monitoring organ function.

Treatment 

Pharmacological treatment of both PUD and pancreatitis is dependent on the aetiology and the chief complaint. In PUD, the epigastric pain is commonly due to high acidity and the loss of barrier protection of the stomach, which in turn causes discomfort. Therefore, medications such as proton pump inhibitors (PPIs) provide symptom relief by reducing acid production in the stomach. If the PUD is caused by an H. pylori infection, antibiotics would need to be added to the regimen in order to eradicate the infection. Pancreatitis also presents with pain, but unlike PUD, pain in pancreatitis is usually treated with analgesics such as NSAIDs and opioids. Compared to chronic pancreatitis, the most important step in acute pancreatitis is to stabilise the patient. This is usually done with aggressive IV fluid therapy¹¹ with electrolyte replenishment. Sometimes, surgical intervention can be done for both PUD and pancreatitis. As mentioned above, pancreatic duct obstruction is one of the main causes of pancreatitis. Thus, certain procedures can be carried out to dissolve the stones. In cases where the pancreatitis fails to resolve after multiple interventions, resecting the pancreas¹² via surgical methods can be considered. Since some risk factors increase the chances of obtaining either PUD or pancreatitis, it is essential that we make certain lifestyle modifications to minimise the risk. For instance, one should avoid injurious agents like NSAIDs, caffeine, and smoking to reduce the chances of PUD. For pancreatitis, one should be counselled regarding heavy alcohol consumption, tobacco use, and hypertriglyceridemia. Weight loss can be considered for those who are obese, as it can help reduce the chances of both PUD and pancreatitis. 

Summary

In conclusion, PUD and pancreatitis are major GI disorders that affect many worldwide. Despite both of them being present with abdominal discomfort, their aetiology and pathophysiology have significant differences. Therefore, each of them presents unique challenges in terms of diagnosis, treatment, and management approach. PUD is characterised by mucosal erosion of the stomach or duodenum and is usually caused by prolonged NSAID use or H. pylori infections. Management focuses on lifestyle modifications, antacids for symptomatic relief, and antibiotic therapy for infections. For pancreatitis, heavy alcohol use, and gallstones are two of the more common causes of pancreatic inflammation. Managing pancreatitis includes fluid therapy and electrolyte replenishment for acute cases, identifying risk factors and minimising them, and surgical options can also be considered. Besides early detection, appropriate management and monitoring for disease development can help to improve prognosis and patient outcomes in both PUD and pancreatitis. Collaborative efforts between healthcare professionals such as gastroenterologists, surgeons, and dieticians are just as important for more optimal and comprehensive care. With the advancement of medical science, the prognosis for PUD and pancreatitis, as well as the quality of life of those affected, continues to improve.