Lymphoedema & blood clot

Can anyone advise, Mum 1st Breast cancer was DX 15 years ago 2nd reoccurance was 3 years ago, now Bone Mets. she had Lymphoedema for 15 years controlled really well, until last week, swelling really bad and colour changin in her breast / scar area.

She has just been confirmed as having a blood clot on her shoulder. Vascular Doc does not know how to treat her, can anyone let me know if they have had any experience of this and can it be treated?

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