What are the recommendations for management of a child with Warfarin induced DVT (Paradoxical)?

In the initial days after starting warfarin therapy, a paradoxical skin necrosis has been well described. By the same mechanism (decreased Protein C and S levels), Is deep vein thrombosis possible ? If so, what is the treatment?

I have a child with Steroid Resistant nephrotic syndrome on WARFARIN THERAPY for previos RVT, presently developed fresh DVT (on day 7 of Warfarin therapy)..