When people ask what percentage of tumors grow, you need to ask, "by how much".
From the abstract of the article, "Growth in the first year of observation is a strong predictor of tumor growth". This is why I waited one year before deciding what to do. Nothing else seems to predict growth; not age, sex, presenting symptoms, initial tumor size, tumor location or tumor side.
I like the study since it's from Australia :-)
An interesting thread regarding how many tumors grow can be found on this forum
https://www.anausa.org/smf/index.php?topic=23404.msg979773646#msg979773646The real question is how many tumors grow more that 2, 3, 4, and 5 mm. An even better question is what percentage of tumors need to be treated
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1502035/pdf/sbs16095.pdf.
I should point out that I am not a doctor and the opinions expressed in various published studies do vary widely.