[1] [1] RADOVIC S, SELAK I, BABIC M, et al. Anti-cytokeratin 7: a positive marker for epithelial dysplasia in flat bowel mucosa［J］. Bosnian Journal of Basic Medical Sciences, 2004, 4(3): 24-30.

[2] [2] KUMMAR S, FOGARASI M, CANOVA A, et al. Cytokeratin 7 and 20 staining for the diagnosis of lung and colorectal adenocarcinoma［J］. British Journal of Cancer, 2002, 86(12): 1884-1887.

[3] [3] MOLL R, FRANKE W W, SCHILLER D L, et al. The catalogue of human cytokeratins: patterns of expression in normal epithelia［J］. Tumors and Cultured Cells, 1982; 31(1): 11-24.

[4] [4] CHU P, WU E, WEISS L M. Cytokeratin 7 and cytokeratin 20 expression in epithelial neoplasms: a survey of 435 cases［J］. Modern Pathology, 2000, 13(9): 962-972.

[5] [5] UNGARI M, TANZI G, VAROTTI E, et al. A case of trichogerminoma: a rare cutaneous follicular neoplasm［J］. Pathologica, 2021, 113(6): 449-455.

[6] [6] SHAHABINEJAD M, ZARE R, MOHAJERTEHRAN F, et al. Cytokeratins (CK7 and CK20) genes expression association with?clinicopathological indices?in oral squamous cell carcinoma and dysplastic oral epithelium［J］. Reports of Biochemistry and Molecular Biology, 2021, 10(1): 126-134.

[7] [7] SREE U D, PRAYAGA A K, R REDDY V V, et al. Differential expression of CK7, CK20, CDX2 in intestinal and pancreatobiliary types of preriampullary carcinoma［J］. Indian Journal of Microbiology, 2022, 65(1): 42-48.

[8] [8] LI L, ZHOU F, LIN F, et al. Clinicopathologic characteristics of thyroid like low-grade nasopharyngeal papillary adenocarcinoma: a case report［J］. Applied Immunohistochemistry & Molecular Morphology, 2019, 27(8): e81-e84.

[9] [9] WOODS R S R, KEEGAN H, WHITE C, et al. Cytokeratin 7 in oropharyngeal squamous cell carcinoma: a junctional biomarker for human papillomavirus-related tumors［J］. Cancer Epidemiology, Biomarkers & Prevention, 2017, 26(5): 702-710.

[10] [10] VIDARSDOTTIR H, TRAN L, NODIN B, et al. Immunohistochemical profiles in primary lung cancers and epithelial pulmonary metastases［J］. Human Pathology, 2019, 84(2): 221-230.

[11] [11] OFUCHI T, HAYASHI H, YAMAO T, et al. Colon cancer metastasis mimicking a hilar cholangiocarcinoma: a case report and literature review［J］. Case Reports in Surgery, 2020, 6(1): 225.?

[12] [12] LANDAU M S, KUAN S F, CHIOSEA S, et al. BRAF-mutated microsatellite stable colorectal carcinoma: an aggressive adenocarcinoma with reduced CDX2 and increased cytokeratin 7 immunohistochemical expression［J］. Human Pathology, 2014, 45(8): 1704-1712.

[13] [13] SHIN J H, BAE J H, LEE A, et al. CK7, CK20, CDX2 and MUC2 immunohistochemical staining used to distinguish metastatic colorectal carcinoma involving ovary from primary ovarian mucinous adenocarcinoma［J］. Japanese Journal of Clinical Oncology, 2010, 40(3): 208-213.?

[14] [14] BARTEK J, VOJTEEK B, STREKOVA Z, et al. A series of 14 monoclonal antibodies to keratins: characterization and value in diagnostic histopathology［J］. Journal of Pathology, 1991, 164(3): 215-224.

[16] [16] RAMAEKERS F C, VAN NIEKERK C C, POELS L, et al. Use of monoclonal antibody to keratin 7 in the differential diagnosis of adenocarcinomas［J］. American Journal of Pathology, 1990, 136(3): 641-655.

[17] [17] OYAMA Y, NISHIDA H, KUSABA T, et al. Colon adenoma and adenocarcinoma with clear cell components: two case reports［J］. Diagnostic Pathology, 2019, 14(1): 37.

[18] [18] LAMBAUDIE E, CHEREAU E, POUGET N, et al. Cytokeratin 7 as a predictive factor for response to concommitant radiochemotherapy for locally advanced cervical cancer: a preliminary study［J］. Anticancer Research, 2014, 34(1): 177-181.

[19] [19] LU S, YAKIREVICH E, WANG LJ, et al. Cytokeratin 7-negative and GATA binding protein 3-negative breast cancers: clinicopathological features and prognostic significance［J］. BMC Cancer, 2019, 19(1): 1085.

[20] [20] HRUDKA J, FISEROVA H, JELINKOVA K, et al. Cytokeratin 7 expression as a predictor of an unfavorable prognosis in colorectal carcinoma［J］. Scientific Reports, 2021, 11(1): 17863.