You might have surgery to remove lymph nodes in your tummy (abdomen). These are called the retroperitoneal lymph nodes. This operation is called a retroperitoneal lymph node dissection. This is a ...

In his book The Mathematical Universe, mathematician William Dunham wrote of John Venn’s namesake legacy, the Venn diagram, “No one in the long history of mathematics ever became better known ...

During surgery, your doctor may also do a lymph node biopsy. This procedure lets them take a sample of lymph nodes to inspect for cancer cells. It can be hard to choose between a lumpectomy or ...

And the core mechanism that allows any blockchain system to distribute data – decentralizing storage and verification across a variety of independent participants – is called nodes.