What are the types of cancer?

There are five main types of cancer: cancer of epithelial origin, cancer of mesenchymal origin, neuroectodermal origin, cancer of hematopoietic origin and other special types of cancer. Common lung cancer, esophageal cancer, gastric cancer, colorectal cancer, liver cancer, pancreatic cancer, bladder cancer, cervical cancer, etc. 2. Mesenchymal tissue origin of cancer: These cancers originate in connective tissue, fat, muscle, blood vessels, lymphatic vessels and other mesenchymal tissue. Such as fibrosarcoma, liposarcoma, osteosarcoma, rhabdomyosarcoma, leiomyosarcoma, angiosarcoma, lymphangiosarcoma, etc. 3. Neuroectodermal tumors: including retinoblastoma, neuroblastoma, medulloblastoma, etc. 4. Cancers derived from hematopoietic tissues: These cancers originate from bone marrow hematopoietic stem cells or precursor cells, such as leukemia, lymphoma, multiple myeloma, etc. 5. Other special types of cancer: Such as malignant melanoma, Ewing's sarcoma, malignant mesothelioma, etc. It should be noted that there are many ways to classify cancer, and the above are only common classification methods. Different types of cancer may differ in treatment methods and prognosis. For cancer diagnosis and treatment, many factors need to be considered, including tumor type, size, location, patient's age, health status, etc. If cancer is suspected, seek medical attention promptly, conduct relevant examinations and diagnosis, and treat according to doctor's advice.