Granular cell tumors of the tongue: fibroma or schwannoma

Head & Face Medicine

Table 3 Histopathological and immunohistochemical characteristics in 7 cases of GCT of the tongue

Case	Capsule	PCH	S-100 protein	Vimentin	PGP 9.5	NSE	Calretinin	GFAP	CD68	PAS	Ki-67 index (%)^a
1	–	–	+	+	+	+	+	+	+	+	2.57
2	–	+	+	+	+	+	+	+	+	+	3.22
3	–	+	+	+	+	+	+	+	+	+	1.21
4	–	–	+	+	+	+	+	+	+	+	0.42
5	–	–	+	+	+	+	+	+	+	+	1.83
6	–	+	+	+	+	+	+	+	+	+	1.63
7	–	–	+	+	+	+	+	+	+	+	2.42

Abbreviations GCT granular cell tumors, GFAP glial fibrillary acidic protein, NSE neuron-specific enolase, PAS periodic acid-Schiff, PCH pseudocarcinomatous hyperplasia, PGP protein gene product
^aThe Ki-67 index was calculated as the percentage of positive cells in a minimum sample of 1000 cells. Mean Ki-67 index, 1.89%

ISSN: 1746-160X