Stage 0 (high grade dysplasia)

Stage 0 means that there are severely abnormal cells in the inner lining of the stomach. Doctors sometimes call this high grade dysplasia (HGD). There’s very little risk of any having spread.

It's not usual for stomach cancer to be diagnosed this early.

Diagram of stomach cancer stage 0


The stage of your cancer helps your doctor to decide what treatment you need. Treatment also depends on:

  • your type of cancer (the type of cells the cancer started in)
  • where the cancer is in your stomach
  • other health conditions

For stage 0 cancer your surgeon may be able to remove the cancer 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 can then put a thin wire (snare) through the tube to remove the cancer cells. This surgery is called endoscopic mucosal resection or EMR.

You may need surgery to remove part or all of your stomach if it’s not possible to remove your cancer with an endoscopic mucosal resection.

About other stages

Last reviewed: 
20 Dec 2019
  • AJCC Cancer Staging Manual (8th Edition)
    M Amin and S Edge.
    Springer, 2017.

  • Gastric cancer: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-up 
    E Smyth and others, 
    Annals of Oncology, 2016. Volume 27, Pages v38–v49

  • Guidelines for the management of oesophageal and gastric cancer
    Association of Upper Gastrointestinal Surgeons of Great Britain and Ireland, the British Society of Gastroenterology and the British Association of Surgical Oncology
    Allum (and others)
    Gut 2011;60:1449-1472

  • Gastric cancer
    Custem EV and others
    The Lancet, 2016 Volume 388, Issue 10060, Pages 2654-2664

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