Figure 1

Immunohistochemical staining for ADAM 10 on paired primary adenoid cystic carcinoma (a) and corresponding metastatic lymph nodes (b) and in 20 primary foci tissues without cervical lymph node metastasis (c). Scale bar = 100 μm. (d) The IOD value of ADAM 10 staining (mean ± SD) in metastatic lymph nodes was significantly higher than that in primary tumors (*p < 0.001).