Objective To investigate the expression of Schwann's cell markers S-100 and GFAP in lacrimal adenoid cystic carcinoma, and to explore the relationship between GFAP or S-100 expression and neural invasion of adenoid cystic carcinoma. Methods Twenty-eight lacrimal adenoid cystic carcinoma and 9 normal lacrimal gland specimens were collected . Each specimen was stained by S-P(streptavidin/peroxidase) immuno- histochemical staining. The expression of S-100 and GFAP was analyzed by immunohistochemistry in order to find the difference in the above-mentioned tissues. One-way ANOVA, Student,s test, chi-square test or linear correlation were carried out for statistical evaluation. Results The average S-100 Index(S-100LI) in nor-neural invasion group and neural invasion group were 0.62±1.19 and 16.73±24.74,respectively,in lacrimal gland adenoid cystic carcinoma. (P<0.05). The average GFAP LI in nor-neural invasion group and neural invasion group were 0 and 2.07±3.01,respectively,in lacrimal gland adenoid cystic carcinoma. (P<0.05). Conclusions Schwann’s cell markers GFAP and S-100 in neural invasion group is higher than that in nor-neural invasion group (P<0.05). The Schwann’s cell differentiation may account histologically for the neural invasion of lacrimal gland adenoid cystic carcinoma.
Key words
lacrimal adenoid cystic carcinoma /
S-100 /
glial fibrillary acidic protein /
neural invasion /
immunohistochemistry
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