Stages of stomach cancer

High grade dysplasia of the stomach

High grade dysplasia (HGD) means that there are severely abnormal cells in the inner lining of the stomach.

What is high grade dysplasia?

High grade dysplasia (HGD) means that there are severely abnormal cells in the inner lining of the stomach. This is sometimes called stage 0.

High grade dysplasia is found in the top layer of cells in the stomach lining. It can be difficult to diagnose. HGD can change to invasive cancer if you don’t have any treatment.

Treatment

Your surgeon may be able to remove the abnormal cells from the lining of the stomach. You have this surgery through a flexible tube called an endoscope. You’re asleep when you have it.

The doctor puts the tube down your throat. They then use a small knife or thin wire (snare) through the tube to remove the abnormal cells.

You may need surgery to remove part or all of your stomach if it’s not possible to remove the abnormal cells in this way.

Find out about endoscopic treatment and surgery for high grade dysplasia

About other stages

Last reviewed: 07 Mar 2025

Next review due: 07 Mar 2028

Survival for stomach cancer

Survival depends on many factors including the stage of your stomach cancer when you are diagnosed and how it has responded to treatment. The figures for stomach cancer survival can only be used as a general guide.

Getting diagnosed with stomach cancer

You should see your GP if you notice a change that isn't normal for you. They will do some tests and may refer you to a specialist if they think your symptoms could be due to stomach cancer.

Surgery for stomach cancer

The type of surgery you need depends on where the cancer is in your stomach and the stage of your cancer.

Coping and support when you have stomach cancer

Coping with cancer can be difficult. Help and support is available. There are things you can do, people to help and ways to cope with a diagnosis of stomach cancer.