Yellowing of the skin and whites of the eyes, light-coloured stools and dark urine could be signs of obstructive jaundice – a condition where normal drainage of bile from the liver to the small intestines is blocked.
Obstructive jaundice is not a disease in itself but a symptom of an underlying condition involving the liver, the gallbladder or the pancreas. It will usually require surgical intervention, and is also known as surgical jaundice.
Gallstones, which can easily be removed by surgery, are the most common cause of obstructive jaundice.
The liver produces bile to digest food and deliver waste products to the intestines for elimination. When bile drainage is obstructed, bilirubin – a byproduct of red cell recycling – builds up in the liver and spills over to the bloodstream, causing the skin and whites of eyes to turn yellowish.
It is important to distinguish between the possible causes of obstructive jaundice. While the common causes are related to gallstone disease, the more sinister causes are related to cancer (pancreatic cancer, bile duct cancer, or less commonly liver cancer).
One of the main distinguishing symptoms between benign and malignant causes is pain. Painful obstructive jaundice is usually related to gallstones, while painless obstructive jaundice tends to be related to tumours. The reason for this difference is that stones tend to harbour bacteria and cause bile duct infection, resulting in pain and fever.
Interestingly, as pain is not a key feature for malignant causes, patients with tumours tend to seek expert help later. Such patients may also have worrisome symptoms of weight loss and loss of appetite.
Obstructive jaundice is one of two types of jaundice (surgical or medical jaundice). Patients with medical jaundice will have yellowing of the skin, without dark urine or lightcoloured stools. Medical jaundice can be related to:
All these types of jaundice lead to an abnormal increase of bilirubin, causing the yellowing of the skin.
