Abstracts
P1. Immunoablation with t cell depleted autologous peripheral blood stem cell rescue produces complete remission in thrombocytopenic purpura (TTP) recidivant and refractory to standard treatment
I. Espigado, J. Rodríguez, M. Carmona, D. Alonso, E. Ríos, J. Pérez-Hurtado, M. Martino, P. Noguerol, M. Vinuesa, R. Parody. Seville, Spain
| The first 150 words of the full text of this article appear below. |
Background: TTP is a life threatening uncommon condition. Immune mechanisms may play a part in its pathogenesis. First line treatment is based on plasma exchange, and roughly 85% of cases respond. Refractory and resistant/recidivant forms usually have a poor prognosis despite the association of alternative treatments. There is increasing evidence of the efficacy of high dose immunosuppression treatment in diseases with possible autoimmune pathogenesis.
Patient and methods: In April 1998 a 38 year
old woman was diagnosed with severe TTP. She was treated with intensive plasma exchange, achieving complete remission. While she was on a
plasmapheresis programme, the disease showed a recidivant and progressive course and became refractory to plasmatic exchange. It was
also resistant to steroids, intravenous immunoglobulin, vincristine,
and splenectomy. After written informed consent, treatment with
cyclophosphamide was started 1 g/m2 × 5 doses and a sixth
dose of 3 g/m2 followed by G-CSF (10 µg/kg/day × 7 days) to mobilise haemopoietic progenitor cells. Three cytapheresis
procedures were
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