MT ( microlithiasis of the testicle ) is another term used for nodules of calcium in the testicle. If you read the following article (reference 1} you will see that according to studies done 40% are associated with tumours some of which may turn malignant. In the second website that I have quoted below they say testicular trauma can give rise to calcification and an association with cancer is not known. In the third website the article says that there is no clear association between testicular calcification and cancer. All 3 documentations are from reliable sources. I would summarise by saying that if there is a single calcification it may be due to some trauma but if there are multiple foci then further investigations have to be done. I am a medical doctor.