Table 1: Immunohistochemical results for each tumor morphology.

MorphologyAE1/3CK7VimNECA19-9AFPHepCD117P53Ki67

Adeno++++++FocalFocal+50%
Clear cell++Scattered single cells+Focal++20%
LCNEC++++Focal++80%
SpindleFocalFocal+FocalFocal+50%

Adeno: adenocarcinoma; LCNEC: large cell neuroendocrine carcinoma; spindle: spindle cell carcinoma; AE1/3: cytokeratin cocktail AE1/AE3; CK7: cytokeratin 7; Vim: vimentin; NE: neuroendocrine markers chromogranin, synaptophysin, and CD56; AFP: alpha fetoprotein; Hep: Hep Par 1; LCNEC: large cell neuroendocrine carcinoma.