J Korean Assoc Oral Maxillofac Surg.  2015 Dec;41(6):352-356. 10.5125/jkaoms.2015.41.6.352.

Basal cell adenoma in the deep portion of the parotid gland: a case report

• Chung WY
• Kim CH

• KMID: 2133185
• DOI: http://doi.org/10.5125/jkaoms.2015.41.6.352

Abstract

Basal cell adenoma (BCA) is a rare, benign neoplasm that most frequently arises in the parotid gland. We treated a 54-year-old female patient with BCA that had developed in the deep portion of the left parotid gland. The patient presented with gradual facial swelling with no other symptoms. We performed a total parotidectomy to excise the mass, but we preserved the facial nerve. Histopathology revealed a well-encapsulated mass. The tumor was composed of islands of comparatively uniform, small, dark, basaloid epithelial cells in the stroma. Histologic and immunohistochemical studies concluded that the BCA tumors were mostly trabecular. Postoperatively, there was no facial nerve weakness, and the tumor did not recur during the 24-month follow-up period.

Keyword

Basal cell adenoma; Parotid gland; Facial nerve preservation

MeSH Terms

Adenoma*
Epithelial Cells
Facial Nerve
Female
Follow-Up Studies
Humans
Islands
Middle Aged
Parotid Gland*

Figure

• 

  Fig. 1 Computed tomography scan; 1.7×1.5 cm sized well-encapsulated enhancing mass on left parotid gland. A. Axial. B. Coronal.

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  Fig. 2 Incision design has been made. Dotted line, swelled region; narrow line, incision line; wide line, contour of angle of mandible.

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  Fig. 3 A. The superficial part of the parotid gland has been excised. B. Excision of tumor with preserving the facial nerve and the branches. C. Excised tumor. D. The facial nerve and the branches have been preserved.

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  Fig. 4 A. Fibrous capsule of the tumor is surrounding trabecular tumor cell nests (H&E staining, ×40). B. Trabecular tumor cells and tumor cell nest formation (H&E staining, ×200). C. The basal cells are expressed by p63 (immunohistochemical staining, ×200). D. The luminal cells of tubular structure are stained by HMK-CK (immunohistochemical staining, ×200).

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