2023
DOI: 10.1007/s12105-023-01580-8
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Clear Cell Squamous Cell Carcinoma of the Maxillary Gingiva Associated with PIK3CA and HRAS Mutations: Report of a Case and Literature Review

Katsutoshi Hirose,
Takumi Shibahara,
Akari Teramoto
et al.

Abstract: Background Squamous cell carcinoma (SCC) is the most common oral malignancy, and somatic mutations in some driver genes have been implicated in SCC development. Clear cell SCC (CCSCC) is a rare histological variant of SCC, and various clear cell neoplasms must be considered in the differential diagnosis of CCSCC in the oral cavity. Based on a limited number of CCSCC cases reported in the oral cavity, CCSCC is considered an aggressive variant of SCC with a poor prognosis; however, its genetic char… Show more

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Cited by 3 publications
(3 citation statements)
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“…Genetic mutations were evaluated in all cases using NGS with a custom panel, as previously described [ 32 ]. NGS identified a TP53 p.C176F (c.527G > T) somatic mutation classified as pathogenic in case 3 and a TP53 p.R282W (c.844 C > T) somatic mutation classified as pathogenic in case 4 (Table 1 ).…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Genetic mutations were evaluated in all cases using NGS with a custom panel, as previously described [ 32 ]. NGS identified a TP53 p.C176F (c.527G > T) somatic mutation classified as pathogenic in case 3 and a TP53 p.R282W (c.844 C > T) somatic mutation classified as pathogenic in case 4 (Table 1 ).…”
Section: Resultsmentioning
confidence: 99%
“…To examine mutational status, we performed next-generation sequencing (NGS) with a custom panel, as previously described [ 32 ]. The gene panel was designed using SureDesign ( https://earray.chem.agilent.com/suredesign ) to cover the exons of TP53 or genes associated with the PI3K/AKT and RAS/RAF signaling pathways ( PIK3CA , AKT1 , PTEN , BRAF , MAP3K3 , KRAS , NRAS , HRAS , and RASA1 ) [ 32 , 33 ]. Two pathologists (SO and KH) identified FFPE blocks with more than 15% abnormal tissue content.…”
Section: Methodsmentioning
confidence: 99%
“…Many gene mutations have been found in breast cancer, from inherited mutations in genes such as BRCA1 and BRCA2 to somatic mutations in body cells [6]. Mutations in key genes such as TP53, PIK3CA, and PTEN [7]have been found in various subtypes of breast cancer and may lead to dysregulation of key cellular processes such as cell cycle control and DNA repair.…”
Section: Mechanisms Of Breast Cancermentioning
confidence: 99%