Calcinosis Circumscripta Q for GSD & GSDx owners

I have had a tumor removed from one of my dogs elbows, in his case the original site was bitten approx 18mths ago, although this condition can have a genetic base to, as 50% of dogs are GSDs or cross GSDs. Histology back today confirmed calcinosis circumscripta.
Q: as anyone else had a dog with this condition, if you have did more tumors appear anywhere else?