Tumor opening out watery material is not necessarily cancer, there may be benign cysts may also be cancer. The contents of cysts are usually watery, mostly benign; mucinous tumors are mostly jelly-like or watery liquid, and some mucinous tumors may be malignant; some solid tumors, such as ovarian cancer, teratoma, etc., may also have watery material in the tumor, which is a common phenomenon. In addition, localized effusion, such as joint effusion, peritoneal effusion, encapsulated disease, etc., can also appear to be open out of the watery material. For aqueous humor collected from a surgical incision, a pathologic blood cell examination is required. These samples are usually centrifuged and examined by pathologic microscopy. The nature of the tumor needs to be determined by pathological examination, and after the pathological diagnosis is clear, it is also necessary to determine whether the standardized treatment such as chemotherapy and radiotherapy can prevent or slow down the spread and metastasis of the cancer cells, improve the clinical cure rate, and improve the quality of life.