Table 1. Histological and immunohistochemical patterns on the cell block.

Component	AE1/AE3	P53	CD68	CK7	CK19	Syn	SMAD4	CD56	CK20	CA19-9
Pleomorphic cells	+	+	-	+/-	+/-	-	-	-	-	-
Osteoclast-like giant cells	-	-	+	-	-	-	-	-	-	-
Neuroendocrine cells	+	Weak/-	-	+	+	+	+	+	-	+