Volume 20 Issue 4
Apr.  2022
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WANG Tian-tian, CAO Jun-jie, LIU Xu-hui, FAN Zheng, PEI Ren-zhi, LU Ying. Clinical characteristics and treatment of thrombotic thrombocytopenic purpura secondary to connective tissue disease[J]. Chinese Journal of General Practice, 2022, 20(4): 598-601. doi: 10.16766/j.cnki.issn.1674-4152.002409
Citation: WANG Tian-tian, CAO Jun-jie, LIU Xu-hui, FAN Zheng, PEI Ren-zhi, LU Ying. Clinical characteristics and treatment of thrombotic thrombocytopenic purpura secondary to connective tissue disease[J]. Chinese Journal of General Practice, 2022, 20(4): 598-601. doi: 10.16766/j.cnki.issn.1674-4152.002409

Clinical characteristics and treatment of thrombotic thrombocytopenic purpura secondary to connective tissue disease

doi: 10.16766/j.cnki.issn.1674-4152.002409
Funds:

 2017KY144

  • Received Date: 2021-08-21
    Available Online: 2022-08-20
  •   Objective  To analyze the clinical characteristics and treatment of thrombotic thrombocytopenic purpura (TTP) secondary to connective tissue disease (CTD) and explored the treatments of TTP.  Methods  We retrospectively reviewed clinical manifestations, laboratory examinations and treatment, efficacy, and survival of 8 TTP patients secondary to CTD admitted to the Affiliated People ' s Hospital of Ningbo University from January 2014 to June 2017.  Results  All 8 patients with TTP were diagnosed with CTD for the first time. All patients presented with acute onset and atypical clinical presentation. ADAMTS13 (a disintegrin and metalloprotease with thrombospondin type 1 motif, member 13, ADAMTS13) activities were 0 and its inhibitors were positive. All the patients received the treatment of plasma exchange plus steroid (1-2 mg/kg). One patient ' s platelet count increased after treatment, and then gave up treatment. In rest 7 patients, the median time of platelet recovered to normal after treatment was 12 (4-18) days, ADAMTS13 activity returned to 100% and ADAMTS13 antibody turned negative in 1 month after the treatment. Seven cases received treatment with cyclosporine, azathioprine or cyclophosphamide later. Three patients received maintenance therapy with rituximab 100 mg every 3 months. Seven patients remained in hematologic remissions. Among them, the activity of ADAMTS13 decreased to 30% and its inhibitors were positive in 2 patients at 6 months after the treatment by routine monitoring. ADAMTS13 activity returned to normal adding a small dose of rituximab therapy after 1 month.  Conclusion  TTP secondary to CTD has an atypical clinical manifestations, high clinical suspicion or diagnosis of TTP, as soon as possible to improve ADAMTS13 activity and inhibitor determination, and small dose of rituximab combined with plasma exchange is given as early as possible. Low-dose rituximab maintenance therapy is given to reduce relapse.

     

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