Linking Antley–Bixler syndrome and congenital adrenal hyperplasia: A novel case of P450 oxidoreductase deficiency

The Antley-Bixler syndrome (ABS) is a multiple congenital malformation syndrome with craniosynostosis, radiohumeral synostosis, femoral bowing, choanal atresia or stenosis, joint contractures, urogenital abnormalities and, often, early death. Autosomal recessive and dominant inheritance have been postulated, as has fluconazole teratogenesis. Mutations in POR (P450 (cytochrome) oxidoreductase, an essential electron donor to enzymes participating in cholesterol biosynthesis), have been identified in some patients with the ABS phenotype. Recent evidence suggests that these mutations cause attenuated steroid hydroxylation, which in turn, causes congenital adrenal hyperplasia (CAH) with ambiguous genitalia in both sexes and glucocorticoid deficiency. Here, we report on a new patient with findings of both ABS and CAH that further illustrates how low maternal estriol at prenatal screening can serve as a marker steroid facilitating early diagnosis.

The effects of leukodepletion on the generation and removal of microvesicles and prion protein in blood components

BACKGROUND

Universal leukodepletion (LD) has been implemented in the United Kingdom to reduce the risk of transfusion-transmitted variant Creutzfeldt-Jakob disease. If LD causes microvesiculation of blood cells, however, potentially infectious membrane-associated prion could reach the final products.

STUDY DESIGN AND METHODS

We have measured microvesicles (MV) derived from red cells (RBC-MV), platelets (PLT-MV), and white blood cells (WBC-MV) and cellular prion protein (PrP(c)) in blood components produced by four whole-blood, five RBC, three PLT, and two plasma LD filters and three plateletpheresis techniques.

RESULTS

RBC-MV and PLT-MV were either unaltered or reduced by all processes, with PLT-MV reduced 10-fold by RBC LD and greater than 300-fold by plasma LD. WBC-MV were reduced or unchanged by RBC and PLT LD and reduced by plasma LD. Whole-blood filtration appeared to increase MVs derived from granulocytes, but the load in the final components was comparable to that in processed RBCs in additive solution. PrP(c) was reduced by whole-blood, RBC, and plasma LD and unchanged by PLT techniques. There were differences between various filters and techniques, which were generally minor compared to the overall effects.

CONCLUSION

These findings suggest no detrimental effects of LD processes in terms of generation of MVs or PrP(c) release.

Preoperative transfusion in sickle cell disease: a survey of practice in England

OBJECTIVES

To gather data on current preoperative transfusion practice and postoperative complications in sickle cell disease (SCD) as a prelude to a randomised trial.

METHODS

A prospective one year survey of 114 SCD patients undergoing elective surgery in 31 English hospitals was undertaken.

RESULTS

43%, 39% and 23% of patients respectively [corrected] received no transfusion, top-up and exchange transfusion preoperatively. Overall postoperative complication rates were 18%, 26% and 17%, with SCD related complications of 12%, 8% and 0% respectively. 85% of patients with [corrected]HbSC/HbSss(+)thalassaemia and 71% of obstetric and gynaecology patients were not transfused preoperatively, whereas 59% patients undergoing ENT procedures and 83% of hip replacements had top-up and exchange transfusions respectively. Multivariable logistic regression analysis revealed that having moderate/high risk procedures was a predictor of postoperative complications (OR 4.9 (95% CL: 1.3 to 18), P = 0.017) [corrected] while preoperative transfusion was not (OR 1.7, (95% CL: [corrected] 0.5 to 6), P = 0.41).

CONCLUSION

The lack of clear benefit of transfusion confirms the need for a randomised controlled trial of transfusion vs. no transfusion in patients with HbSS and HbSss(0)thalassaemia.

6 Years of shot reporting--its influence on UK blood safety

Recognition of the importance of systematic surveillance of adverse effects of transfusion has led to the development of haemovigilance schemes [Faber JC. Haemovigilance around the world. Vox Sang 2002;83(suppl.1):71], of which the Serious Hazards of Transfusion (SHOT) scheme, launched in 1996, was one of the first. Over 90% of UK hospitals now participate in the scheme; in 6 years of reporting, SHOT analysed 1630 events of which 64% were errors in the transfusion process, leading to 193 instances of ABO incompatible transfusion. Transfusion related acute lung injury, bacterial contamination of platelets and transfusion-associated graft-versus-host disease were also identified as important preventable causes of mortality and morbidity. Data from SHOT has provided evidence to support the development of blood safety strategies in the UK.

Extended report: nail disease in psoriatic arthritis--clinically important, potentially treatable and often overlooked

OBJECTIVES

To examine the relationship between the severity of nail disease and characteristics of psoriatic arthritis (PsA). We also wished to assess the clinical management of nail disease in patients with PsA.

METHODS

We studied 69 patients with PsA at two visits. On the first visit, a rheumatology assessment of joint, skin and nail disease was made. On the second visit, a detailed dermatology assessment of skin and nails was made. Nail disease was analysed using a 20-nail psoriasis nail severity score (PNSS).

RESULTS

There were 57 (83%) patients with clinical evidence of psoriatic nail disease. Although 66 (96%) patients had been treated for skin disease, only one (1%) had received any treatment for nail disease. Severe nail disease measured by the PNSS correlated with severe skin psoriasis as indicated by the percentage of body surface area affected by psoriasis (r = 0.34, P = 0.004) and physician global assessment of psoriasis (r = 0.45, P<0.001). Patients with distal interphalangeal (DIP) joint disease had higher PNSS scores (P = 0.03). The PNSS was also associated with unremitting and progressive arthritis (P<0.001), and correlated with Stanford health assessment questionnaire (HAQ) (r = 0.34, P = 0.004), depression (r = 0.39, P<0.001) and anxiety (r = 0.34, P = 0.004) scores. Compared with dermatology assessment, the rheumatology examination of nail disease had a positive predictive value of 84% and negative predictive value of 83%.

CONCLUSIONS

In patients with PsA, the severity of nail disease correlates with indicators of severity of both skin and joint disease. Although rheumatologists can adequately screen for nail disease, the management of this aspect of PsA is often overlooked.

Power Doppler ultrasound of rheumatoid synovitis: quantification of therapeutic response

The aim of this study is to quantify power Doppler assessment of therapeutic response in rheumatoid synovitis. 13 patients (6 male, 7 female) with rheumatoid arthritis, who had an acute exacerbation of small joint synovitis in the hands, were examined with quantitative power Doppler, before and after intravenous corticosteroid treatment. All patients were examined by a single radiologist, using an ATL HDI 5000 ultrasound machine (ATL, Boswell). The images were analysed using a specially developed software package (HDI Lab), which quantifies power Doppler signal. All patients improved clinically following treatment, which was reflected in functional disability scores, and in the C-reactive protein levels and erythrocyte sedimentation rate. In all cases, there was a significant decrease in synovial vascularity as measured by the mean amplitude of signal on quantitative power Doppler. Quantitative power Doppler may allow objective assessment of treatment in small joint synovitis.

Clinical assessment of sacroiliitis and HLA-B27 are poor predictors of sacroiliitis diagnosed by magnetic resonance imaging in psoriatic arthritis

OBJECTIVE

To determine the frequency and clinical predictors of sacroiliitis diagnosed by magnetic resonance imaging (MRI) in a psoriatic arthritis (PsA) population.

METHODS

The studied comprised 103 patients with PsA. A careful clinical assessment for sacroiliitis was made from history and examination, and HLA-B27 testing was performed. Sixty-eight patients underwent tilted coronal fat-saturated T1-weighted and STIR MRI of the sacroiliac joints.

RESULTS

Clinical features of moderate or severe sacroiliitis were found in 24/68 (35%) patients. MRI features of sacroiliitis were found in 26/68 (38%) patients. Clinical features of sacroiliitis were present in 14/42 (33%) with normal MRI scans and 10/26 (38%) with abnormal scans (normal vs abnormal scans, P = 0.7). The presence of sacroiliitis on MRI was associated with restricted spinal movements (P = 0.004) and the duration of PsA (P = 0.04). There was no correlation between HLA-B27 and sacroiliitis diagnosed by MRI.

CONCLUSION

Sacroiliitis diagnosed by MRI occurs commonly in PsA but is difficult to detect clinically.

Tracing blood units to their recipients: results of a two-centre study

An important principle of the use of blood components is the ability to trace them from the donor to the recipient. This study set out to establish whether there was sufficient documentation in patient case notes to confirm the transfusion of blood components in a sample of computer blood bank records at two large teaching hospitals in UK. The criteria for verification of transfusion were taken from guidelines from the British Committee for Standards in Haematology (Transfusion Medicine 1999, 9, 227-238). The blood bank computer records indicated that 486 units of blood components were issued and not returned to the blood bank for 80 patients during a 2-month period. Of the 486 units, transfusion of 409 units (84%) was verified against patient notes, but 77 units (16%) could not be verified as received by the patient. The study showed that documentation of transfusions was variable. For example, written prescriptions were only found for 204 units (42%). These results have implications for 'lookback studies' involving blood transfusion. Further efforts are required to educate those involved in transfusing blood about the need for accurate documentation.

Developing a District Health Information System in South Africa: a social process or technical solution?

South Africa initiated a national District Health Information System rollout strategy in the latter half of 1999. Experience has demonstrated that the implementation of an information system as a vehicle for the delivery of accountability in the management of health services, demands organisational change within a framework of human resource development and technical support. The aim of training, to empower facility and district staff to use locally generated information to improve coverage and quality of primary health care services, can only be realized if training and innovation for change are appropriately marketed and supported. The appeal of HISP software, a locally developed application system lies in its user acceptance. While computers form a vital tool in providing easily accessible information for decision-making, their use must not be seen as a panacea for all information problems in primary health care services. Strategies for promoting sustainability of DHIS implementation lie in the social processes of human resource development, changing organisational infrastructure and the use of ongoing evaluation rather than those of technical infrastructure. South Africa has developed a variety of mechanisms to facilitate this process.