What are the early symptoms of cancer?

summary

In medicine, cancer is a kind of malignant tumor originated from epithelial tissue, which is the most common type of malignant tumor. Correspondingly, malignant tumors originated from mesenchymal tissue are collectively referred to as sarcomas. A few malignant tumors are not named according to the above principles, such as nephroblastoma, malignant teratoma, etc. Generally speaking, "cancer" refers to all malignant tumors. Cancer has the biological characteristics of abnormal cell differentiation and proliferation, uncontrolled growth, invasion and metastasis. Its occurrence is a multi factor and multi-step complex process, which is divided into carcinogenesis, cancer promotion and evolution. It is closely related to smoking, infection, occupational exposure, environmental pollution, unreasonable diet and genetic factors. What are the early symptoms of cancer? Let's talk about it

What are the early symptoms of cancer?

It is formed by malignant proliferation of tumor cells, which can be touched by hand on the body surface or deep. Thyroid gland, parotid gland or breast cancer can be touched in the superficial part of the skin. Tumor metastasis to lymph nodes can lead to lymph node enlargement. Some superficial lymph nodes, such as cervical lymph nodes and axillary lymph nodes, are easy to touch. As for gastric cancer and pancreatic cancer in the deeper part of the body, you need to press hard to touch them.

Pain: the swelling growth or ulceration of tumor, infection and so on make the peripheral nerve or nerve trunk stimulated or compressed, which may cause local pain. Pain often indicates that cancer has entered the middle and advanced stage. At first, it was dull or dull pain, and obvious at night. After that, it gradually became more and more intolerable, day and night, especially at night. The effect of general analgesics is poor.

If the tumor on the surface of ulcer or gastrointestinal tract grows too fast, tissue necrosis or ulceration may occur due to insufficient blood supply or secondary infection. Such as some breast cancer can appear in the breast crater like or vegetable pattern ulcer, secretion of bloody secretions, concurrent infection can have stench.

matters needing attention

Radical operation because of the rapid growth of malignant tumor, there is no envelope on the surface, it has no obvious boundary with the surrounding normal tissue, local infiltration is obvious, and it can be metastasized through lymphatic vessels. Therefore, the tumor and its surrounding normal tissues and lymph nodes should be removed completely. This kind of operation is suitable for patients with limited tumor scope, no distant metastasis and good constitution. According to the extent of resection, it can be divided into tumor resection, extensive resection, radical operation and extended radical operation.