Task: Answer Verification
Input (English): Question: Is cyclin D1 expression predictive of occult metastases in head and neck cancer patients with clinically negative cervical lymph nodes?
Answer: Our study indicates that the expression of cyclin D1 correlates with the presence of occult cervical metastases in head and neck carcinoma patients, thus suggesting that its immunohistochemical evaluation in biopsy samples may be used as an additional tool for identifying patients to be treated with elective neck dissection.
Output (English): yes