D00: Carcinoma in situ of oral cavity, oesophagus and stomach
Carcinoma in situ of the oral cavity, oesophagus, and stomach refers to a group of conditions where abnormal cells are found only in the lining of the oral cavity (mouth), oesophagus (the tube that connects the throat to the stomach), or stomach. These cells have not invaded deeper tissues or spread to other areas of the body and, therefore, are termed 'in situ', meaning 'in its original place'. Causes include chronic irritation from alcohol, tobacco, or refluxed stomach acid, infection with certain types of human papillomavirus (HPV), or chronic infection with a bacterium called Helicobacter pylori. Common symptoms may include a long-lasting sore in the mouth, difficulty swallowing, persistent heartburn, or unexplained weight loss. Although these conditions are initially localized, without treatment they may progress to invasive cancer affecting multiple body systems.
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.