04 May 2011
If doctors suspect that a tumour is cancerous, a surgeon may remove part of it to examine under a microscope. This may either been done by a needle, which is put into the tumour through the skin to remove a sample of cells, or by open biopsy, where a small piece of the tumour is taken during a small operation.

The cells will be sent to a laboratory for examination; the results may take several days.

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