The Italian Screening Programme for Fetal Aneuploidies

The Italian Screening Programme for Fetal
Aneuploidies
Pietro Cignini, MD
Department of Prenatal Diagnosis
ARTEMISIA Fetal Maternal Medical Centre
Rome, Italy
e-Health and Info Biomedical Technologies
Budapest, 30 May 2013
Summary
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Artemisia Fetal Maternal Medical Centre
Italian College of Fetal Maternal Medicine
SCA-Test (Computerized Programme for Fetal Aneuploidies)
ERA (Early Risk Assesment)
OSCAR (One-Stop Clinic Assessment of Risk)
• Research Interest:
– Over 10 Years of Experience in Prenatal US
– Over 10 Years of experience in Prenatal Screening
www.pietrocignini.it
ARTEMISIA SPA (Rome, ITALY)
1. Private centre
2. Dpt of prenatal Diagnosis
3. Dpt of Molecular Biology
4. Dpt of day Surgery
5. Dpt of Reproductive
Medicine
Number of amniocentesis per/year 2012
Ministry of Halth Report
APGA Trial
• 2791 obs/gyn
• Largest Scientific Society for Prenatal Care in Italy
• Recognized by the Italian Ministry of Helath
• Journal of Prenatal Medicine (indexed in PubMed)
• Member of the International Federation of
Prenatal Diagnosis
1970 –EmiliaRomagna (IMER) registry , Registry of Tuscany (RTDC)
North East Registry (NEI).
1990 – Campania Region
- monitoring of all congenital malformations and chromosomal aberrations (ICD-10 codes: Q00-Q99)
including Down syndrome = DS
1992 - effectiveness of the prenatal screening (PS) for DS had become the compulsory part of the prenatal care
Prenatal diagnosis of DS 2005 – 2009 (EUROCAT)
Age of mother and efficacy
of prenatal screening
70
72,3%
Diagnosed
60
No. of cases
57,1%
Not diagnosed
50
74,4%
40
30
50,0%
20
10
16,7%
20,0%
28,6%
0
16-19
20-24
25-29
30-34
35-39
40-
Unknow n
Age-group of m other
The older the mother,
the higher the probability of prenatally detected fetus with DS
Facts
• The increasing prevalence of DS can be primarily attributed to the
increasing ratio of advanced age of mothers
• PS showed a significant improvement year by year
• The prevalence of DS and the efficiency of PS was slightly lower than the
values observed in other European countries
• The decreasing ratio of livebirths has indicated the improving
effectiveness of prenatal DS screening practice in Italy
• The increasing geographical inequalities in screening effectiveness
demonstrated the existence of non-exploited opportunities in certain
(non-properly managed) areas of Italy
11. By 2008,
screening programs
should aim to provide
a screen that, as a
minimum, offers
women who present
in the first trimester a
detection rate of 75%
for Down syndrome,
with no more than a
3% false positive
rate. (III-B)
Principles of Screening
Characteristics of Screening Test
Sensitivity (Detection rate): Abn screen, abn result
False Positive Rate*: Abn screen, normal result
False Negative Rate: Normal screen, abn result
Specificity: Normal screen, normal result = 100-FPR
Likelihood Ratio: Proportn Abn / Proportn Normal
* Also called initial positive rate, is used
interchangeably with amniocentesis rate
The SCA-TEST is an ultrasound screening and /
or
biochemical
Multiple
Computerized
Calculation of Risk for Fetal Aneuploidies in the
First and Second Trimester of Pregnancy,
recognized and published on the National
Guidelines of Italian Ministry of Health
• Prospective Study April-October 2007
• Sca-Test II trimester Before Amniocentesis
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Sacco A. et al. Journal of Prenatal Medicine 2007; 1 (4): 47-56
Meta-analysis of second trimester markers for trisomy 21
Agathokleous et al., UOG 2013
Marker
DR
FPR
LR
+ ve
LR
– ve
Isolated
marker
Cardiac echogenic focus
24.4
3.9
5.8
0.80
0.95
Ventriculomegaly
7.5
0.2
27.5
0.94
3.81
Increased nuchal fold
26.0
1.0
23.3
0.80
3.79
Echogenic bowel
16.7
1.1
11.4
0.90
1.65
Mild hydronephrosis
13.9
1.7
7.6
0.92
1.08
Short humerus
30.3
4.6
4.8
0.74
0.78
Short femur
27.7
6.4
3.7
0.80
0.61
ARSA
30.7
1.5
21.5
0.71
3.94
Absent or hypoplastic NB 59.8
2.8
23.3
0.46
6.58
No markers LR 0.13 = 7.7 fold reduction
Meta-analysis 47 studies 1995–2012
Trachea
ARSA
Spine
The Early Risk Assessment (ERA) Program:
First Trimester Screening and
Early Detection of Pregnancy Complications
GOAL
“To promote the health and well-being of
pregnant women through a collaborative and
multidisciplinary prenatal risk assessment program
that would enable early, more accurate
identification and management of pregnancies at
increased risk for adverse perinatal health
outcomes”.
Early Risk Assessment Program
: Prenatal Screening for
Chromosome Disorders
Purpose:
•To introduce FTS
•To develop patient and physician
educational materials
•To evaluate program performance
and patient satisfaction
First Trimester
Combined
Screening
• Maternal age
• NT
• Free-bHCG
• PAPP-A
Early Risk Assessment Program: Early detection of
Pregnancies at risk of Adverse Outcome
1. To examine the predictive value of certain
biochemical/US markers (11 -20 w) in
detection of women at increased risk of
poor pregnancy outcome (pre-eclampsia,
IUGR, preterm labor),
2. To identify risk factors and interventions
that may improve pregnancy outcome in
this group
MSS
FTS
10
12
14
16
Genetic
sonogram
18
Why “Point of Care?”
One Stop Clinics
• One stop clinics have developed in several clinical
areas
– breast cancer screening, menopausal clinics, oncology
assessment, cardiovascular risk clinics, one-stop surgical
clinics
• Benefits:
– integration of clinical and diagnostic services
– better use of clinical time, improved diagnostic efficiency
OSCAR: “One-Stop Clinic
Assessment of Risk”
Patient advantages:
•Maximizes patient satisfaction
•Reduced number of patient visits
•Decreased patient travel costs,
(missing work, babysitting, parking),
anxiety, and stress especially that
associated with waiting for results
•Allows for timely, qualified
interpretation of results
Evidence and Innovations leading to OSCAR
• Ultrasound markers of chromosomal anomalies - fetal nuchal
translucency thickness at 11-14 weeks.
• Maternal serum Biochemical markers of chromosomal
anomalies - free b-hCG & PAPP-A at 10-14 weeks.
• Development of new rapid assay
technology for biochemical marker
measurement leading to Point of Care
testing.
OSCAR in ARTEMISIA
One Stop Clinic for Assessment of Risk
Woman departs
Woman arrives
Post-test counselling
Pre-test counselling*
Free b HCG
NT SCAN
PAPP-A
Blood sample
Risk Assessment
U/S data
Ultrasound
Examination (11-13+6 weeks scan)
www.earlyriskassessment.com
* Mean T/O time 92 minutes
*1-1 Counselling, video, pamphlets
Invasive testing usually not same day
OSCAR in ARTEMISIA
FTS Uptake March 2012-2013
600
500
400
300
200
100
0
MarAprMayJunJulAugSepOctNovDecJanFeb
FTS Performance
March 13 2012- March 13 2013
Screening for Trisomy 21
• DR Trisomy 21 93% (29/32), FPR 6.5% (1/300)
• 2 “false negative” cases:
•1 negative screen for T21, +ve T13,18 (had invasive)
• Other case: no blood obtained, NTS alone.
Characteristics of the T21 cases
•27/ 31 Trisomy 21 (87%) detected prenatally
•CVS 17/27 (63%), amnio 10/26 (38.4%)
• 3 LB T21 in screen +ve group (declined invasive)
•1 had no invasive (FN result)
• Risk assessment on NT alone due to unsuccessful
phlebotomy
OSCAR Satisfaction Study
•Uptake of invasive testing in women
attending the OSCAR clinic:
• Positive screen (T21): 49.1%
• Negative screen: 15%
Invasive uptake related to level of risk
80
60
40
20
0
1/100
1/100-1/1000 >1/1000
*DR of T21 87% at 5% FPR
Clinical audit of prenatal screening for DS I.
Prenatal diagnosis and prenatal screening (PS) of DS
Aims:
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to increase the effectiveness of PS
to improve the quality of PS
to spread the application of the valid professional guideline
to identify of weak points of practice (min)
to describe the priority order of treatments (max)
to increase the number of audited experts in ultrasonic examination
to establish ultrasonic centers
to prepare united proposal for biochemical screening
to map the financial problems
to prepare the revision of protocol
the improve the quality of data reporting
Expected results of clinical audit
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to identify the weak points of screening
to establish necessary intervention
to increase the prenatal detection rate of DS
to decrease the number of unnecessary invasive interventions
to prepare new guideline for PS
to improve the professional skill of sonographers
to establish correct ultrasonic diagnostic machines
Early Prenatal Risk Assessment:
More Than an Aneuploidy Screen
11-14 WEEK SCAN
NT, NB
Fetal anatomy
UA Doppler
Placental morphology
1st TM Volume (3D)
Maternal Serum
PAPP-A
Free beta hCG
Store sample
PHASE 1: FTS
PHASE 2: Pregnancy complications
DETAILED ANATOMY
Fetal echo
Uterine artery Doppler
Placental morphology
Timing of scan
Maternal Serum
AFP,uE3,hCG
DIA?
Contingent screening
Store sample
TV cervix clinic
U/A Doppler
Cervical length
(c/w 18-20 week)
PS Program
Key Points
•One-stop multidisciplinary approach associated with high
patient satisfaction
•Operationally efficient (few call backs, demographic and
ultrasound information available, collaborative atmosphere
between disciplines (MFM, genetics, ultrasound, lab,
nursing).
•Established infrastructure for efficient high quality
ultrasound as well as audit and research
•Ability to introduce new markers/ protocols
•Performance excellent and within expected range
A child can always teachs
an adult three things: to be
happy for no reason,
to always be busy with
something, and to pretend
with all his power what he
wants.
Paulo Coelho, Monte Cinque, 1996
Questions?