D02: Carcinoma in situ of middle ear and respiratory system
Carcinoma in situ of the middle ear and respiratory system refers to a group of conditions where abnormal cells are found in the tissue lining these areas but have not spread to nearby tissues. This initial stage of cancer, termed 'in situ', is typically non-invasive, indicating that the abnormal cells are confined to their place of origin. Commonly affecting the middle ear and parts of the respiratory system (which includes your nose, mouth, voice box, windpipe, and lungs), these conditions exhibit various symptoms. Ear-related symptoms may include hearing loss, ear ache, or discharge. Respiratory-related symptoms might range from persistent coughing, breathing difficulties, fatigue, to unexplained weight loss. The causes of these conditions are not completely understood, but they are believed to be related to exposure to harmful substances such as tobacco smoke and certain infectious agents. Over time, if left untreated, these conditions have potential to progress into invasive cancer, which can spread to nearby tissues or organs.
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