Tumor age determination? 121 viewsJune 14, 2017All Questions and AnswersGeneral Questions 0 Anonymous50 June 14, 2017 0 Comments How is the age of a brain tumor determined? I have heard two differing estimates for the same size meningioma. One said that a 6x6x6 cm brain tumor is 8 years and another said 15 years. 1 Answer ActiveVotedNewestOldest 0 Dr Danish100 Posted June 14, 2017 0 Comments This is almost always a guess by physicians. The most accurate answer for the age of a grade I meningioma is many years. You are viewing 1 out of 1 answers, click here to view all answers. Register or Login