Bilateral squamous cell carcinoma of the temporal bone: A report of two cases and a systematic review of the literature.

Journal of otology Pub Date : 2024-10-01 Epub Date: 2024-11-05 DOI:10.1016/j.joto.2024.07.006

N Hoogenes, M Tomasoni, P Merkus, B I Lissenberg-Witte, C R Leemans, A Deganello, C F Smit

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Abstract

Objective: two new cases of temporal bone squamous cell carcinoma (TBSCC) with a bilateral occurrence are presented. Furthermore, a review of the literature was performed and the yearly incidence was calculated.

Methods: A systematic review of the literature was conducted using PRISMA guidelines.

Results: Twenty-two more cases were found in literature. With a total of 24 cases, the calculated yearly incidence of bilateral TBSCC is 49:10^12 A history of chronic otitis or regional radiotherapy was found in respectively 50% and 12% of patients. In nine patients, the tumors developed synchronously (within 6 months) and in 13 metachronously.

Conclusions: The calculated incidence is 89 times higher than mathematically expected considering the incidence of unilateral cases. An explanation might be a history of chronic otitis or prior radiotherapy. The tumor staging of both the first tumor group and the contralateral tumor group are similar to unilateral temporal bone squamous cell carcinoma series.

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双侧颞骨鳞状细胞癌：两例报告及文献系统复习。

目的：报告两例新发双侧颞骨鳞状细胞癌（TBSCC）。此外，回顾了文献并计算了年发病率。方法：采用PRISMA指南对文献进行系统回顾。结果：文献共发现22例。共24例，计算双侧TBSCC年发病率为49:10^12，分别有50%和12%的患者有慢性中耳炎或局部放疗史。在9例患者中，肿瘤同步发生（6个月内），13例异时发生。结论：考虑到单侧病例的发生率，计算出的发生率比数学上预计的高89倍。一种解释可能是慢性中耳炎病史或既往放疗。第一肿瘤组和对侧肿瘤组的肿瘤分期与单侧颞骨鳞状细胞癌系列相似。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Journal of otology

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