Comparative Analysis of Clinicopathological Characteristics, Survival Features, and Protein Expression Between Basaloid and Squamous Cell Carcinoma of the Esophagus

Yingying Xu,1 Huanyu Zhao,2 Yusuo Tong,1 Wanwei Wang,1 Jing Huang,1 Weiguo Zhu1 1Department of Radiation Oncology, The Affiliated Huaian No.1 People’s Hospital of Nanjing Medical University, Huai’an, Jiangsu, 223300, People’s Republic of China; 2Department of Pathology, The Affiliated Huaian No.1 People’s Hospital of Nanjing Medical University, Huai’an, Jiangsu, 223300, People’s Republic of ChinaCorrespondence: Weiguo Zhu Email zhuweiguo_1270@126.comBackground: Basaloid squamous cell carcinoma (BSCC) is a rare variant of squamous cell carcinoma (SCC) of the esophagus. This study aimed to assess the discrepancy in clinicopathological characteristics and protein expression between esophageal BSCC and typical esophageal SCC.Study Design: We reviewed 40 cases of esophageal BSCC. As controls, 63 well-differentiated SCC (WSCC) patients, 70 moderately differentiated SCC (MSCC) patients, and 51 poorly differentiated SCC (PSCC) patients were selected. The clinicopathologic characteristics and immunoreactivity of Ki-67, p53, p63, and epidermal growth factor receptor (EGFR) were then evaluated in the BSCC and typical SCC patients.Results: The 5-year survival rates for the BSCC patients were 27.5%. The prognostic outcomes of the BSCC group were similar to those of the PSCC and MSCC groups but worse than that of the WSCC group, with a significant difference (P=0.045). Ki-67 expression was significantly higher in the BSCC group than that in the WSCC group (P 0.05). The median survival time of esophageal the BSCC patients with low p53 expression was significantly longer than that of the patients with high p53 expression (P=0.026). Further, the median survival time of the esophageal BSCC patients with high p63 expression was significantly longer than that of the patients with low p63 expression (P=0.041). Meanwhile, Ki-67 and EGFR expressions were not correlated with OS in the BSCC group.Conclusion: Esophageal BSCC has a more clinically virulent course. Notably, p53 and p63 expression are associated with prognosis in BSCC. These findings conject that evaluation of multiple cancer biomarkers might be a promising auxiliary diagnostic indicator in BSCC.Keywords: basaloid squamous cell carcinoma, Ki-67, p53, p63, EGF