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Malignant tumors of the parotid gland metastasis lymph nodes are generally smaller in diameter, mostly 1.0-1.5cm, must increase observed after. Parotid lymphomas are divided into primary and secondary, primary lymphoma originated in the parotid gland, secondary lymphoma occurring in the parotid lymph nodes, often for non He Jie s lymphoma involving the parotid gland, if history is not clear it is difficult to identify, the group of 1 patients with secondary lymphoma ( patients with non Hodgkin lymphoma patients ) showed more characteristic, one side parotid gland diffuse enlargement, with concomitant ipsilateral facial skin and fascia extensive thickening, subcutaneous fat in the cable and the grid shape high density image, neck lymph node extensive enlargement. Parotid metastasis of cancer is more common in adjacent organs such as the scalp, external, orbital, nasopharynx and other parts of the primary cancer metastasis, distant metastasis is rare. From the purely imaging manifestations with parotid primary cancer to identify this group, 1 cases of metastatic carcinoma of nasopharyngeal carcinoma, primary, on both sides of the parotid gland are transferred.

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