Case Report
Copyright ©The Author(s) 2019. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Jun 6, 2019; 7(11): 1351-1357
Published online Jun 6, 2019. doi: 10.12998/wjcc.v7.i11.1351
A large basal cell adenoma extending to the ipsilateral skull base and mastoid in the right parotid gland: A case report
Lu-Yang Du, Xiu-Hong Weng, Zhen-Yu Shen, Bo Cheng
Lu-Yang Du, Zhen-Yu Shen, Department of Stomatology, Union Hospital, Tongji Medical College, HuaZhong University of Science and Technology, Wuhan 430022, Hubei Province, China
Xiu-Hong Weng, Bo Cheng, Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei Province, China
Author contributions: Du LY analysed the data and wrote the paper; Weng XH collected the medical imaging materials and analysed the data; Shen ZY collected the medical imaging materials; Cheng B designed the report and performed the preliminary revision of the article. All authors contributed to this article.
Informed consent statement: Consent was obtained from the patient for publication of the report and accompanying images.
Conflict-of-interest statement: There are no conflicts of interest declared by the authors.
CARE Checklist (2016) statement: The authors have read the care checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Corresponding author: Bo Cheng, DDS, PhD, Associate Professor, Department of Stomatology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan 430071, Hubei Province, China. chengbo@znhospital.cn
Telephone: +86-135-07190986
Received: January 17, 2019
Peer-review started: January 17, 2019
First decision: March 10, 2019
Revised: April 2, 2019
Accepted: April 9, 2019
Article in press: April 10, 2019
Published online: June 6, 2019
Abstract
BACKGROUND

Basal cell adenoma (BCA) is a rare benign tumour that has unique histological characteristics and primarily arises in the parotid glands. According to published reports, nearby tissue destruction by BCA seems impossible.

CASE SUMMARY

We presented a case of a 54-year-old woman with a mass in the deep lobe of the right parotid gland involving the ipsilateral skull base and mastoid. The patient exhibited gradual right facial swelling but no other obvious symptoms. Combined resection of the total right parotid gland and partial skull base excision were performed. The biopsy conducted before the surgery and sections cut from intraoperatively obtained tissues were not definitive for identifying the character of the neoplasm. A final diagnosis of tubular BCA without malignant elements was established based on postoperative pathology results and immunohistochemical analysis. The tumour did not recur during the 12-mo follow-up period.

CONCLUSION

A diagnosis of BCA can only be established based on a histopathological examination after an excisional biopsy, and tubular BCA should carefully be considered as a destructive type.

Keywords: Basal cell adenoma, Mastoid, Parotid gland, Skull base, Total parotidectomy, Case report

Core tip: Basal cell adenoma (BCA) is a rare benign tumour that has unique histological characteristics and primarily arises in the parotid glands. Destruction of nearby tissue by BCA has not been reported. We presented a case of tubular BCA in the deep lobe of the parotid gland involving the ipsilateral skull base and mastoid. It suggests that a diagnosis of BCA can only be established after an excisional biopsy, and tubular BCA should carefully be considered as a destructive type.