Fast forward my MD ordered an ultrasound and mammo for the seroma/scar tissue just to confirm. The radiologist saw tissue in the seroma and couldn't confirm that it was just a seroma so ordered a biopsy. The ultrasound pre biopsy saw an additional seroma (I had been telling them it seemed like 2 seperate lumpy areas) and so she punch biopsied both and also aspirated both to test fluid.

Thankfully all came back clear. Fat necrosis, scar tissue. Huge relief and thankful for the confirmation.