A pancreas scan uses nuclear radiology to search for, and sometime treat, tumors in the pancreas.

Pancreatitis is the swelling (inflammation) of the pancreas. This happens when digestive juices or enzymes attack the pancreas.

A percutaneous endoscopic gastrostomy (PEG) tube is a feeding tube surgically placed through your abdomen into your stomach.

A peptic ulcer is a sore on the lining of your stomach or the first part of your small intestine (duodenum).

Peritonitis is a redness and swelling (inflammation) of the tissue that lines your belly or abdomen. This tissue is called the peritoneum.

Portal hypertension is high blood pressure of the portal vein, which is in your abdomen. It collects nutrient-rich blood from your intestines and carries it to the liver for cleaning.

Pyloric stenosis is a problem that causes forceful vomiting. It affects babies from birth to 6 months of age. It can lead to dehydration. This condition is the second most common reason why newborns have surgery.