The vast majority of salivary gland tumors are epithelial tumors, and the pathological types are complex. The clinical manifestations, imagi
The vast majority of salivary gland tumors are epithelial tumors, and the pathological types are complex. The clinical manifestations, imaging findings, treatment and prognosis of different types of tumors are different.
The most common tumor of salivary gland, parotid gland, submandibular gland and the small salivary gland, sublingual gland is rare. Benign tumors account for the majority of parotid tumors. Submandibular gland tumor proportion is close to that of minor salivary gland malignant tumors than the benign, malignant tumors accounted for the vast majority of sublingual gland. Adult salivary gland tumors are more benign than malignant ones.
Benign and malignant tumors of salivary glands, like other benign and malignant tumors, have their own clinical features.
Different parts of salivary gland tumors have their own clinical features. The corresponding neural symptoms of malignant tumors invading nerve, lingual cancer prone to lymph node and distant metastasis.
The imaging diagnosis includes B ultrasound, CT, 99mTc nuclide imaging and magnetic resonance imaging.
According to the biological behavior of the tumor, salivary gland malignant tumors can be divided into three types: one is highly malignant tumor, the other is the high rate of cervical lymph node metastasis. Low grade malignant tumor, cervical lymph node and distant metastasis rate is low, although recurrence may occur, but the prognosis is relatively good. Moderate malignant tumor, its biological behavior and prognosis of patients between the two.
The operation of salivary gland tumor is mainly surgery, and the operation should be carried out from the normal tissue outside the tumor capsule, and at the same time, the partial or whole gland is removed. According to the nature of the tumor, the facial nerve and cervical lymph nodes should be treated differently. For some salivary gland malignant tumors, radiotherapy can significantly reduce the recurrence rate. The survival rate of patients with salivary gland cancer is high, the long-term survival rate is decreased, and the prognosis should be more than 10 years.
Pleomorphic adenoma is the most common salivary gland tumor, because its capsule is not complete, can not be removed, should be removed in the normal tissue, parotid tumor resection of facial nerve.
Warthin tumor with clinical characteristics of a series of 99m Tc scintigraphy was "hot" nodule, has the characteristic, the lower part of the parotid gland after partial resection of parotid tumors can be used.
Mucoepidermoid carcinoma is the most common malignant tumor of salivary gland, which can be divided into two types: high differentiation and low differentiation.
Adenoid cystic carcinoma is one of the most common malignant tumors of salivary gland. It is characterized by the proliferation of the tumor and the infiltration of the tumor. Appropriately enlarging the scope of surgery and postoperative radiotherapy may reduce the recurrence rate.