There are many different types of adenomas. The type depends on where in the body the tumour develops and the type of cells making the glands.
Common types of adenomas include:
The cells in a gland stick together to form a ring with a hollow centre called a lumen. Glands produce a variety of substances that help organs function normally. For example, the glands in the stomach make and release substances that help break down food.
The glands in an adenoma are abnormal. For example, they tend to be darker and closer together than the glands in normal tissue. These tumours also often have more glands and the glands are less organized than the glands in normal tissue. These differences allow your pathologist to recognize an adenoma from normal glands.
Adenomas are non-cancerous tumours. However, some are considered a pre-cancerous condition because they can turn into cancer over time. The risk associated with an adenoma depends on the type, its location in the body, and whether your pathologist sees any evidence of an additional cellular change called dysplasia.
Talk to your doctor about about the risk associated with your type of adenoma.