CAV1 and metastatic malignant neoplasm in the lymph nodes: Upon univariate analysis with Cox's proportional hazards model, lymph node metastasis (P=0.0007), tumour diameter (P=0.0027), positive surgical margin (P=0.0014) and caveolin-1 immunopositivity (P=0.0011) were all positively correlated with poor prognosis.