C69: Malignant neoplasm of eye and adnexa

Malignant neoplasm of the eye and adnexa refers to a group of conditions involving the development of cancer cells in various parts of the eye and its related structures (called the adnexa), such as the eyelid and tear ducts. This abnormal growth can happen when cells in these areas multiply uncontrollably and do not undergo normal cell death. The exact cause is unknown, but certain factors like genetics, exposure to ultraviolet radiation, and having specific medical conditions may contribute. Symptoms can vary widely but may include vision changes, eye redness or irritation, a noticeable lump, and sometimes pain. These conditions can progressively damage the eye and potentially affect vision, which can gradually worsen if the cancer cells spread or grow larger. Despite this, not all neoplasms are fast-growing, and the rate of progression can greatly differ depending on various factors such as the exact location and type of neoplasm.