A hypoechoic nodule seen in the upper pole of the right parotid gland may be parotid lymphoma, or it may be related to mixed tumor of parotid gland, mucoepidermoid carcinoma and other diseases.
1. Parotid lymphoma: It is a non-Hodgkin’s lymphoma occurring in the parotid gland, which is usually benign but may be malignant. It usually appears as a hypoechoic nodule on ultrasound.
2. Mixed tumor of parotid gland: it is pleomorphic adenoma of parotid gland, the etiology of which has not been clarified, and it is related to polygenic mutation to some extent. It is characterized by a homogeneous hypoechoic nodule with honeycomb structure, or it may be anechoic.
3. Mucinous epidermoid carcinoma: it is a malignant tumor. A well-differentiated mass may also appear as a hypoechoic nodule on ultrasound.
It is impossible to judge the nature of the nodule only by hyperechoic, and it needs to be analyzed according to its boundary, morphology and whether there is calcification or not. It is recommended to go to regular hospitals for perfect examination and timely treatment.