Benign and malignant tumors What is the difference?

Any tumors are harmful to health, the threat of different tumor physician accordingly divided into two categories malignant tumors and benign tumors. Benign tumor cells in morphology and function of the organization closer to the corresponding normal cells. Tumor sustained slow expansion of growth and oppression of the surrounding normal tissue, we can form coated, clear boundaries. In the local tumor growth, oppression and have obstructive symptoms, but the tumor cells from the original site will not be detached and transferred to other parts of a new metastases. Therefore, the majority of benign tumors can be completely resected without recurrence, completely cured, less harmful to the human body. Malignant tumor cells and the structure and function of the corresponding normal cells have greater differences form strange, weakened, enhance or loss. Tumor growth faster, and often penetrated the surrounding normal tissue, unclear boundaries. Tumor cells from the tumor, is very easy to piece through lymphatic, vascular or other cavity, the operation to his form new metastases. Apart from the oppression and malignant tumors caused obstructive symptoms, but also a possible merger hemorrhage, necrosis, such as fever. Many cancer patients, especially in advanced disease can be extremely emaciated, known as cachexia. As a malignant tumor infiltrating growth, it is difficult completely removed easily after recurrence, and tumors often transferred to the regional lymph node or disseminated to the body, can hardly cure, and ultimately can often lead to patients died. It is worth noting that between benign and malignant tumors sometimes there is no absolute limits, the performance of some tumors may be somewhere in between, called borderline tumors. For example, bladder papillomas with benign morphology, but easy to relapse, or even transformed into malignant tumors. Benign tumors such as hemangioma have no capsule, Boundary unclear, easy recurrence after resection. Benign tumors occur in certain vital organs can also lead to serious consequences, such as benign intracranial (meningioma, astrocytomas) oppression brain tissue, blocking the ventricular system, causing great harm; Also in the heart of mesothelioma, only a few mm in size, but can cause arrhythmia resulting in sudden death. Cancer is not all bad prognosis, such as basal cell skin cancer slow growth, almost no transfer, as can be completely cured after treatment. Benign and malignant tumors are not immutable, some benign if not promptly treated, may change for the cancer, such as ovarian tumors heinous into ovarian cancer. Occasionally, malignant tumors can be benign change, such as a children's cancer neuroblastoma may change as benign tumor of the nerve ganglion cells.