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CD117 is common immunostain.

Normal tissue positive

  • Mast cells.[1]
  • Cajal cells.[1]
  • Germ cells.[1]
  • Melanocytes.[1]


See also


  1. 1.0 1.1 1.2 1.3 Miettinen M, Lasota J (September 2005). "KIT (CD117): a review on expression in normal and neoplastic tissues, and mutations and their clinicopathologic correlation". Appl Immunohistochem Mol Morphol 13 (3): 205–20. doi:10.1097/01.pai.0000173054.83414.22. PMID 16082245.
  2. Ulbright TM, Tickoo SK, Berney DM, Srigley JR (August 2014). "Best practices recommendations in the application of immunohistochemistry in testicular tumors: report from the international society of urological pathology consensus conference". Am. J. Surg. Pathol. 38 (8): e50–9. doi:10.1097/PAS.0000000000000233. PMID 24832161.