‘Tumour depth matters more than its size’
In oral cancer, tumour depth matters more than its size. Over the past 30 years, staging of oral cancer was done by the size of the tumour. But the new staging system for head and neck cancer that will be effective from January 1, 2018, will include the depth of invasion. "This is an exciting time to understand the diagnosis, staging and to find appropriate treatment for oral cancer. Now, we have evidence that shows that the cure for cancer is dependent on how deep the tumour is growing, which might be more important than how big the tumour is on the surface," said Dr Terry Day, director, division of head & neck oncology, Medical University of South Carolina, US. He said the depth of invasion could sometimes predict how aggressive the cancer would be and predict whether it is spread to the lymph nodes or the blood stream. "The most important change in oral cancer is how deep the cancer has grown into the tissues," said Dr Day. India has the most cases of oral c...