There is soft tissue calcification, tho I've not heard of that. HITTING a bone hard can cause calcification from the bone's injury. HAVE you gotten an in depth explanation.of.the difference? I ask this question because you said your son is involved in sports as a reason for him to not have a bone injury. I suggest that it's more likely that someone who plays sports to have a bone injury than a child with less activity. SOME of what you describe doesn't make sense when looking at the whole picture.
Yes, it is possible that his doctor is trying to reassure you by giving another test. I'm surprised that after the tests were normal, they are willing to do more testing/imaging. MY numerous doctors over years spend time wit me being sure I understand why they're not concerned without taking further action. PERHAPS it's because once I understand what they are saying I accept their answer. But then I've trusted my doctors. I had a bump on my shin. Doctor suggested it was caused by an injury, even so slight I didn't remember hitting my shin. He said wait and see. HE didn't do any tests. SEVERAL years later the bump is gone.
A friend has a large lump on his forehead. DOCTOR was not concerned. It's been 25 years, the bump is still there. HE hasn't had any other symptoms.
IF you haven't asked what is the worst that this could be when all tests were normal, I suggest you ask. Is there danger in a wait and see situation?
I would also directly ask if he is ordering an ultrasound to reassure you. WE have the best medical care when we ask questions and are willing to accept their advice based on their training and experience.
You are right! DR. Google only scares us. I ask when I want information about a condition that I and my friends have already received a diagnosis. I know that Dr Google can not make a diagnoses based only on words.
BTW since mamapedia has added dozens more pop ups, my phone turns letters into caps. WHEN I try to correct them, the computer garbled up the words by changing the letters I type into something different that may not even be a word. I've quit trying.