Cysts of the parotid gland are relatively rare. However, ultrasound is useful in detecting them with ease, especially with the new high definition probes now available. These ultrasound videos demonstrate one such case:
The ultrasound features of this cystic lesion are also similar to those of a benign mass of the parotid that has undergone cystic degenerative changes (much like the central necrosis that occurs in neoplasia like fibroids of the uterus).
View more images of this case and detailed description at: http://www.ultrasound-images.com/salivary-glands.htm#Cystic_lesion_of_parotid_salivary_gland
Observe carefully- there are two cysts, not one. The smaller cyst is 4mm. in size compared to the 20 mm. of the larger cyst. My personal intuition is that these are retention cysts of the parotid gland. See some more color Doppler /ultrasound videos of this case:
The ultrasound features of this cystic lesion are also similar to those of a benign mass of the parotid that has undergone cystic degenerative changes (much like the central necrosis that occurs in neoplasia like fibroids of the uterus).
View more images of this case and detailed description at: http://www.ultrasound-images.com/salivary-glands.htm#Cystic_lesion_of_parotid_salivary_gland
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