Table 1

IHC of primary and CNB tumor tissue

AntigenLabeling (NEG/POS)
Primary
 CK7NEG
 CK20 POS
 CD56NEG
 ChromograninNEG
 Synaptophysin (Syp)Weak POS
 TTF-1NEG
CNB
 CK7NEG
 CK20 POS
 CD56Neg
 CD99 POS
 ChromograninNEG
 FLI-1 POS
 Synaptophysin (Syp)Weak POS
 TdTNEG
 TTF-1NEG
 AE1/AE3 Strong POS
  • CNB, core needle biopsy; IHC, immunohistochemistry; NEG, negative; POS, positive.