Abstract
Background
Although thrombotic thrombocytopenic purpura frequently affects women of childbearing age, there is no clear recommendation for the management of subsequent pregnancies in women with established thrombotic thrombocytopenic purpura.
Methods
This single-center, retrospective, observational study included all women with hereditary thrombotic thrombocytopenic purpura or immune thrombotic thrombocytopenic purpura who had had at least one subsequent pregnancy after thrombotic thrombocytopenic purpura diagnosis between 2003 and 2022. The strategy comprised weekly surveillance of platelet count during pregnancy (and quarterly monitoring of ADAMTS13 activity) for women with immune thrombotic thrombocytopenic purpura, without any routine prophylactic treatment. In case of thrombocytopenia < 150,000/mm3 (with or without hemolysis relapse), women with hereditary thrombotic thrombocytopenic purpura systematically received plasma infusions twice weekly until platelet count normalized.
Results
A total of 13 patients were included (7 with hereditary thrombotic thrombocytopenic purpura and 6 with immune thrombotic thrombocytopenic purpura, with 20 planned pregnancies (11 and 9, respectively). All pregnancies resulted in live births, and all mothers survived. There was a marked improvement in pregnancy terms in the hereditary thrombotic thrombocytopenic purpura group compared to index pregnancies (37 [35;39] versus 31 [24;38] weeks, p = 0.037) and birth weights (3265 [3029;3410] versus 2160 [1240;2705] grams, p = 0.016), with need for plasma support mostly starting during the third trimester (5/7 patients, 7/11 pregnancies). A single hereditary thrombotic thrombocytopenic purpura relapse occurred, with rapid resolution after plasma support intensification. There were no relapses in the immune thrombotic thrombocytopenic purpura group, with ADAMTS13 activity systematically above 40% during all monitored pregnancies.
Conclusion
These real-life data support the feasibility of a preemptive approach to pregnancy monitoring in women with known thrombotic thrombocytopenic purpura who undergo active surveillance within a multidisciplinary network.
Graphical abstract
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Data availability
All data are available upon reason request for the corresponding author.
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Thanks to Felicity Kay for providing drafts and editorial assistance to the authors during preparation of this manuscript.
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Study concept and design: AH, CP, FP; data acquisition and management: CP, FP, AB, CZ, J-BG, MS; statistical analyses: AH; drafting of the manuscript: AH, CP, FP; critical revisions: AH, CP, RL, CR, AB, CZ, DS, J-BG, MS, PC, AL, MM, MH, and FP; all authors approved the final version of the manuscript.
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40620_2023_1790_MOESM4_ESM.jpg
Supplementary Supplementary Figure 2. Placental histology in index and first subsequent pregnancies (patient #3). Index pregnancy (intrauterine death at 26 weeks’ gestation): syncytial nuclear aggregates and placental villous hypermaturation (a, hematoxylin and eosin x4); perivillous trophoblast necrosis and recent placental infarction (b, hematoxylin and eosin x4). First subsequent pregnancy under monitoring (live birth delivery at 35 weeks’ gestation): normal placental histology without any evidence of villous hypermaturation or infarction (c, d, hematoxylin and eosin x4) file4 (JPG 1202 KB)
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Hamroun, A., Prouteau, C., Lenain, R. et al. The challenging follow-up of pregnancy in women with known thrombotic thrombocytopenic purpura: a single-center experience of a preemptive management protocol. J Nephrol 36, 2519–2529 (2023). https://doi.org/10.1007/s40620-023-01790-x
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DOI: https://doi.org/10.1007/s40620-023-01790-x