TH and cervical cancer: However, staining of TH (tyrosine hydroxylase, dopaminergic neuron marker) or VAChT (choline acetyltransferase, cholinergic neuron marker) was not significantly increased in PNI-positive cervical cancer tissues (Fig. S1g, Supporting Information), indicating that sympathetic or parasympathetic nerve, resident in the cervix, were not directly involved in the neurogenesis during PNI of cervical cancer.