Is light yellow or white stool definitely a sign of cancer?

Generally speaking, light yellow or pale stool is not necessarily a sign of cancer. A detailed explanation is as follows:

When stool appears white or clay-colored, the most common clinical cause is obstructive jaundice. Obstructive jaundice primarily results from impaired bile drainage due to blockage in the intrahepatic bile ducts or common bile duct. This obstruction prevents stercobilinogen from being excreted through the intestines and stool, causing it to instead re-enter the liver and bloodstream, eventually being excreted through urine. This condition may be caused by diseases such as common bile duct stones, biliary ascariasis, or primary sclerosing cholangitis, and is not necessarily indicative of cancer.

However, if abnormal stool color persists for a prolonged period and is accompanied by other symptoms such as abdominal pain, rectal bleeding, or unexplained weight loss, it could be related to digestive system cancers such as liver cancer, bile duct cancer, or pancreatic cancer. These cancers can interfere with the normal secretion and flow of bile, leading to changes in stool color. It is recommended to seek timely medical evaluation and undergo appropriate diagnostic tests.

In daily life, maintaining a balanced diet, engaging in regular physical activity, ensuring adequate sleep, and cultivating a positive mindset are beneficial for overall health. Eating plenty of fruits and vegetables, managing stress, and undergoing regular health checkups can also help maintain good health.