Cytokeratin 19

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Cytokeratin 19, abbreviated CK19, is a commonly available (low molecular weight) keratin immunostain.[1]



  • Thyroid.[2]
  • Gastrointestinal tract.[2]
  • Pancreas.[2]
  • Salivary gland - marks luminal cells.



See also


  1. Yui, T.; Ohmachi, T.; Matsuda, K.; Okamoto, M.; Taniyama, H. (Apr 2015). "Histochemical and immunohistochemical characterization of chordoma in ferrets.". J Vet Med Sci 77 (4): 467-73. doi:10.1292/jvms.14-0488. PMID 25648567.
  2. 2.0 2.1 2.2 Jain, R.; Fischer, S.; Serra, S.; Chetty, R. (Jan 2010). "The use of Cytokeratin 19 (CK19) immunohistochemistry in lesions of the pancreas, gastrointestinal tract, and liver.". Appl Immunohistochem Mol Morphol 18 (1): 9-15. doi:10.1097/PAI.0b013e3181ad36ea. PMID 19956064.
  3. Bremmer, F.; Ströbel, P.; Hubertus, H.; Strecker, J.; Gaisa, N.; Strauß, A.; Schweyer, S.; Radzun, H-J. et al. (2015). [‎Cached "CK19 is a sensitive marker for yolk sac tumours of the testis."]. Diagnostic Pathology 10 (7). doi:10.1186/s13000-015-0243-y.‎Cached.
  4. 4.0 4.1 Masai, K.; Nakagawa, K.; Yoshida, A.; Sakurai, H.; Watanabe, S.; Asamura, H.; Tsuta, K. (Dec 2014). "Cytokeratin 19 expression in primary thoracic tumors and lymph node metastases.". Lung Cancer 86 (3): 318-23. doi:10.1016/j.lungcan.2014.09.018. PMID 25453845.