PMC4066564_01
A 65-year-old woman with a hard consistency mass at right mandible.
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Physical examination revealed a hard consistency mass about 7 cm x 7.5 cm over the right mandibular ramus (Fig. 1).
Axial non-contrast enhanced CT scan of the mandibular ramus shows a circumscribed margin, multilocular cystic mass at the right side with internal coarse, irregular calcifications (A). Bone window image reveals a very thin bone around the expansile mass (B). The tumor has contact surface with the right parotid gland and caused lateral displacement of the gland in a contrast enhanced film (C).
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Computed tomography scan showed a large multilocular low density area at the ascending ramus of the mandible attached to the parotid gland and an ill-defined border between submandibular gland and the mass (Fig. 2).
Surgical specimen (tumor at ascending ramus of the mandible).
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Segmental mandibulectomy, parotidectomy and submandibular gland resection were performed (Fig. 3).
Histopathology of the tumor shows cystic cavities lined with single layer of cuboidal cells with mild nuclear pleomorphism. (A) (H&E stain, 400x magnification). The tumor's immunohistochemical stainings are positive for CK7 (B), CK19 (C) and CEA (D)
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The necrosis and perineural invasion is not present (Fig. 4).
Picture of the patient 1 year after surgery.
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