ITP

ITP (Immune thrombocytopenia purpura) is due to immune destruction of platlelet.
Ab coated plt removed following binding to Fc receptors on macrophages
ITP in children – acute, history of recent viral infection-varicella, measles
ITP adult- less acute, seen in women, may be asso with autoimmune disorders such as SLE, thyroid diseases
CLL and solid tumours
Infections with virus- HIV
Clinical- major bleed rare, easy bruising
Inv-FBC, bone marrow-increased megakaryocytes
Treatment-Plt> 30x 109 no urgent trt
First line- steroid 1mg/kg body wt
IV igG is effective if needed rapid rise
Second line-splenectomy
Third line –failed both then danazol, other immunosuppressive such as azathioprine,ciclosporin , mycophenolate mofetil