Doppler studies of the uterine artery as a test for the subsequent development of pregnancy complications are best performed at 20 weeks with a combination of RI measurements and the assessment of the presence of diastolic notches.

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Objectives:To describe the thickness of mesorectal fat in local Chinese population and its impact on rectal cancer staging.Design: Case series.Setting: Two local regional hospitals in Hong Kong.Patients: Consecutive patients referred for multidisciplinary board meetings from January to October 2012 were selected. Main outcome measures:Reports of cases that had undergone staging magnetic resonance imaging for histologically proven rectal cancer were retrospectively retrieved and reviewed by two radiologists. All magnetic resonance imaging examinations were acquired with 1.5T magnetic resonance imaging. Measurements were made by agreement between the two radiologists. The distance in mm was obtained in the axial plane at levels of 5 cm, 7.5 cm, and 10 cm from the anal verge. Four readings were obtained at each level, namely, anterior, left lateral, posterior, and right lateral positions.Results: A total of 25 patients (16 males, 9 females) with a median age of 69 (range, 38-84) years were included in the study. Mean thickness of the mesorectal fat at 5 cm, 7.5 cm, and 10 cm from the anal verge was 3.1 mm (standard deviation, 3.0 mm), 9.8 mm (5.3 mm), and 11.8 mm (4.2 mm), respectively. The proportions of patients with mean Limitation of radiological T3 subclassification of rectal cancer due to paucity of mesorectal fat in Chinese patients

Objective: To identify specific angiographic factors associated with haemorrhagic presentation of brain arteriovenous malformation in Chinese paediatric patients. Design:Retrospective cross-sectional observational study. Setting Main outcome measures:The following parameters were evaluated for their association with haemorrhagic presentation by univariate and multivariate analyses: nidus location, nidus size, nidus morphology (diffuse or compact); origin and number of arterial feeders; venous drainage; number of draining veins; presence of aneurysms, venous varices, and venous stenosis.Results: A total of 67 children and adolescents (28 male, 39 female) with a mean age of 12 years were included. Of them, 52 (78%) presented with haemorrhage. Arteriovenous malformation size (P=0.004) and morphology (P=0.05) were found to be associated with haemorrhagic presentation by univariate analysis. Small arteriovenous Angiographic factors associated with haemorrhagic presentation of brain arteriovenous malformation in a Chinese paediatric population New knowledge added by this study • Studies on paediatric arteriovenous malformation (AVM) are scarce and mostly based in Caucasian populations. This multicentre study involving Chinese paediatric patients found that small AVM nidus size and diffuse nidal morphology are independent risk factors for haemorrhage. Implications for clinical practice or policy • These two angiographic features associated with haemorrhagic presentation can help local clinicians to assess bleeding risk and determine the therapeutic approach (aggressive vs conservative) and treatment timeframe in paediatric patients with cerebral AVM.