Salivary duct cyst of accessory parotid gland in contact with the temporomandibular joint

Publication date: Available online 17 September 2017
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Atsushi-Doksa Lee, Takashi Mima, Yasunari Morimoto, Yoko Takigawa
A 60-year-old woman presented with a painless swelling in the right preauricular region. Physical examination revealed a soft, non-tender, oval-shaped lump in this location. Computed tomography scanning indicated an anterolateral cystic lesion that was attached to the condyle of the mandible and to the accessory parotid gland. Differential diagnoses included ganglion cyst, synovial cyst of the TMJ, and accessory parotid gland cyst. Surgical removal of the cyst was performed under general anesthesia. The specimen was 18 × 20 × 18 mm in size; it contained fluid that was clear, slightly yellow, and amylase-positive. Hematoxylin and eosin staining revealed that a bilayer cuboidal epithelium lined the cyst wall. Immunohistochemical analyses of the cyst wall showed strong expression of cytokeratin and weak expression of vimentin. The final diagnosis was a salivary duct cyst. The postoperative course was uneventful except for a transient facial motor paresis.



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