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The role of CT scan of the brain in the pre-operative work-up of solitary lung metastases associated with colorectal cancer.

This report presents three cases of 'cured' rectal cancer which developed solitary lung metastases during the follow-up period. Further metastatic work-up did not disclose any evidence of disease. Neurological examination was normal. Surgical resection of the pulmonary metastases was done. Brain metastases were discovered a short time after. The importance of the CT scan of the brain in the pre-operative work-up is discussed.