This disease shows no obvious symptoms in its early stages; once discovered, it's cancer!

Anal cancer is a relatively rare form of cancer, and the types of tumours in the anus are more complex due to their location at the junction of the inner and outer layers of the embryonic tissues. Anal cancer typically originates from the tissues around the anus, including the anal skin, anal canal, or the mucous membrane inside the anus.

Bone cancer can be divided into primary and metastatic, which refers to cancer that has spread from other parts of the body to the bone tissue. The majority of cases fall under metastatic bone cancer. As for primary bone cancer, it originates in the bone cells and is relatively rare.

Brain tumours are not commonly seen, with approximately 1,000 new cases reported annually in Hong Kong. Among primary malignant brain tumours (i.e., brain cancer), glioblastoma accounts for approximately 80 new topics each year. The brain is the central organ of the human body, controlling our abilities, such as thinking, memory, language, emotions, and activities. Once invaded by cancer cells, the functions of the brain will be affected to varying degrees, and treatment is also more challenging compared to other types of cancers.