Pregnancy-associated thrombotic thrombocytopenic purpura with anti-centromere antibody-positive Raynaud's syndrome

Unexpected frequency of Upshaw-Schulman syndrome in pregnancy-onset thrombotic thrombocytopenic purpura

Pregnancy may be complicated by a rare but life-threatening disease called thrombotic thrombocytopenic purpura (TTP). Most cases of TTP are due to an acquired autoimmune or hereditary (Upshaw-Schulman syndrome [USS]) severe deficiency of a disintegrin and metalloprotease with thrombospondin type 1 repeats, member 13 (ADAMTS13). In the present study, we performed a cross-sectional analysis of the national registry of the French Reference Center for Thrombotic Microangiopathies from 2000-2010 to identify all women who were pregnant at their initial TTP presentation. Among 592 adulthood-onset TTP patients with a severe ADAMTS13 deficiency, 42 patients with a pregnancy-onset TTP were included. Surprisingly, the proportion of USS patients (n = 10 of 42 patients [24%]; confidence interval, 13%-39%) with pregnancy-onset TTP was much higher than that in adulthood-onset TTP in general (less than 5%) and was mostly related to a cluster of ADAMTS13 variants. In the present study, subsequent pregnancies in USS patients not given prophylaxis were associated with very high TTP relapse and abortion rates, whereas prophylactic plasmatherapy was beneficial for both the mother and the baby. Pregnancy-onset TTP defines a specific subgroup of patients with a strong genetic background. This study was registered at www.clinicaltrials.gov as number NCT00426686 and at the Health Authority, French Ministry of Health, as number P051064.

Thrombotic thrombocytopenic purpura

A 34-year old primipara was admitted to hospital with dichorionic-diamniotic twins in 26+3 weeks of gestation. In suspicion of HELLP-syndrome, caesarean section was performed at 27+4 weeks of gestation, because of platelet count was reduced to 44000/µl. A re-laparotomy had to be performed because of intra-abdominal bleedings. The patient was given seven packed thrombocytes and five packed erythrocytes. The patient complained about blurred vision. The right corner of the mouth was slightly depressed in terms of a facial nerve paresis. Further platelet counts were about 50000/µl. Haemoglobin: 7.8 mg/l. D-Dimer: 1066 mg/l. LDH was elevated to 1610 U/l, reticulocytes were elevated to 13.19% and haptoglobin was reduced to <0.08 g/l. The Coombs' test was negative. The ADAMTS-13 test showed a reduced activity. Hereby, the diagnoses of thrombotic thrombocytopenic purpura was confirmed. Plasma exchange is the most effective option; application of platelet concentrate should be avoided, because of worsening microangiopathy and subsequent neurological situation. After the patient has received plasma exchange, platelet count normalized. An ophthalmic examination showed a dysfunction in choroid perfusion as a cause for the blurred vision. After discharge regular lab tests were planned, but no further treatment was necessary at that point of time. The premature twins survived after ventricular haemorrhage, severe sepsis, bronchopulmonary dysplasia and other complications of neonates.

Crescentic glomerulonephritis and microangiopathic haemolytic anaemia in a patient with established systemic sclerosis

This article reports a case of Goodpasture's syndrome and microangiopathic haemolytic anaemia developing in a patient with a 2-year history of systemic sclerosis. Goodpasture's syndrome usually presents with lung haemorrhage and acute renal failure, and kidney biopsy typically shows crescentic glomerulonephritis with linear immunoglobulin staining on the glomerular basement membrane. Treatment of choice for Goodpasture's syndrome is immunosuppressive therapy and plasma exchange, which has greatly improved morbidity and mortality. This unusual case highlights that seemingly unrelated autoimmune diseases may coexist in one patient, and thorough clinical examination combined with serology and histology may be necessary for correct diagnosis.