OBJECTIVE: To evaluate the presence of chronic cerebrospinal venous
insufficiency (CCSVI) and cerebral venous anomalies in a consecutive series of
patients with multiple sclerosis (MS), other neurologic diseases (NEU) and healthy
METHODS: A consecutive series of 80 MS patients, 41 HC and 40 NEU cases
underwent a transcranial and extracranial echo-color Doppler (ECD) evaluation
of cerebrospinal venous return in a sonographer-blinded fashion. According to
the original Dr. Zamboni’s protocol, CCSVI was diagnosed in presence of ≥2 ECD
RESULTS: We did not observe any association between CCSVI and MS. CCSVI
was detected in 17.5% of MS cases, 7.3% of HC and 11.5% of NEU patients
(p=0.333). The prevalence of internal jugular vein stenosis (IJV) and the
proportion of patients with any positive ECD criterion differed significantly
among groups, being higher in MS cases versus HC (67.5% and 76.2% versus 48.8%
and 41.5%, respectively; p=0.005 and p=0.006). No relationship between CCSVI
and MS type and severity was evidenced.
CONCLUSIONS: The present study argues against a positive link between
CCSVI and MS risk or severity. Interestingly, a weak association between venous
ECD anomalies (in particular IJV stenosis) and MS was observed in our
population. This finding should be interpreted with caution due to the possible
confounders and needs to be confirmed in large controlled studies.
More negative evidence for a causal role of CCSVI and MS, but more vascular
problems in MSers
Epub: Barreto et al. Chronic cerebrospinal venous
insufficiency: Case-control neurosonography results. Ann Neurol.
2012 Dec . doi: 10.1002/ana.23839.
OBJECTIVE: Chronic cerebrospinal venous insufficiency (CCSVI), has been
implicated in the pathophysiology of multiple sclerosis (MS). We sought to
determine if neurosonography (NS) provides reliable information on cerebral
venous outflow patterns specific to MS.
METHODS: Single center, prospective case-control study of volunteer MS
and non-MS participants. A neurosonologist, blind to the subject’s diagnosis,
used high resolution B-mode imaging with color and spectral Doppler to
systematically investigate, capture and record extracranial and intracranial
venous drainage. These neuroimaging results were evaluated and scored by an
expert blinded to subject’s information and with no interactions with the
RESULTS: Altogether 276 subjects were studied: 206 with MS and 70
non-MS. MS patients were older than non-MS subjects (48.3±9.9 vs 44.3±11.8
years, p<0.007), with durations from first symptoms and diagnosis of 13.7±10
and 9.9±7.8 years, and EDSS 2.6±2.0. Overall, 82 subjects (29.7%) fulfilled one
of five NS criteria proposed for CCSVI; 13 (4.7%) fulfilled two criteria
required for diagnosis, none fulfilled >2 criteria. The distribution of
subjects with 0, 1 or 2 criteria did not differ significantly across all
diagnostic groupings, between MS and non-MS subjects, or within MS subgroups.
CCSVI was present in 7.14% of non-MS and 3.88% of MS patients (p=0.266). No
significant differences emerged between MS and non-MS subjects for extracranial
or intracranial venous flow rates.
INTERPRETATION: NS findings described as CCSVI are much less prevalent
than initially reported, and do not distinguish MS from other subjects. Our
findings do not support the hypothesis that CCSVI is causally associated with
The interpretation says it all.
Insufficiency Is Not Associated with Multiple Sclerosis and Its Severity: A
Blind-Verified Study. PLoS One. 2013;8(2):e56031. Epub 2013 Feb.
BACKGROUND: Chronic Cerebrospinal Venous Insufficiency (CCSVI) has been
associated with multiple sclerosis (MS) with a risk ranging from as high as
two-hundred-fold to a protective effect. However, not all studies were blinded,
and the efficacy of blinding was never assessed.
OBJECTIVE: To evaluate the association of CCSVI with MS in a
cross-sectional blinded study and look for any association of CCSVI with the
severity of MS.
METHODOLOGY/PRINCIPAL FINDINGS: The Echo-color Doppler examination was
carried out in accordance with Zamboni’s five criteria in 68 consecutive MS
patients and 68 healthy controls, matched by gender and age (±5 years). Four
experienced neurosonologists, blinded to the status of cases and controls,
performed the study and were then asked to guess the status (case or control)
of each participant. The number of positive CCSVI criteria was similar in the
two groups. CCSVI, defined as the presence of two or more criteria, was
detected in 21 cases (30.9%) and 23 controls (33.8%), with an OR of 0.9
(95%CL = 0.4-1.8, p = 0.71). The prevalence of CCSVI was related to age in
cases (OR increasing from 0.2 to 1.4), but not in controls. CCSVI positive
(N = 21) and negative (N = 47) MS patients were similar in clinical type, age
at disease onset, disability, and fatigue. Disease duration was longer
(16.5±9.8 years) in CCSVI positive than negative patients (11.5±7.4; p = 0.04).
The operators correctly guessed 34/68 cases (50%) and 45/68 controls (66%)
(p = 0.06), indicating a different success of blinding.
CONCLUSIONS/SIGNIFICANCE: CCSVI was not associated with MS itself, nor
its severity. We cannot rule out the possibility that CCSVI is a consequence of
MS or of aging. Blinding of sonographers is a key point in studying CCSVI and
its verification should be a requisite of future studies.
The conclusions say it all, Surely there is now enough evidence to say CCSVI
is not the cause of MS?
BACKGROUND: This study aimed to investigate the prevalence and clinical
relevance of chronic cerebrospinal venous insufficiency (CCSVI) in multiple
sclerosis (MS) patients and healthy controls using extra- and intracranial
colour Doppler sonography.
METHODS: We examined 146 MS patients, presenting with a clinically
isolated syndrome, relapsing-remitting, secondary progressive, or primary
progressive MS, and 38 healthy controls. Sonographic examination was performed
according to Zamboni’s protocol and was performed by three independent
sonographers. The results of sonographic examination were compared with
clinical and demographic characteristics of the patients.
RESULTS: CCSVI, defined as the presence of at least two positive
Zamboni’s criteria, was found in 76% of MS patients and 16% of control
subjects. B-mode anomalies of internal jugular veins, such as stenosis,
malformed valves, annuli, and septa were the most common lesions detected in MS
patients (80.8%) and controls (47.4%). We observed a positive correlation
between sonographic diagnosis of CCSVI and the patients’ age (p=0.003).
However, such a correlation was not found in controls (p=0.635). Notably, no
significant correlations were found between sonographic signs of CCSVI and
clinical characteristics of MS, except for absent flow in the jugular veins,
which was found more often in primary (p<0.005) and secondary (p<0.05)
progressive patients compared with non-progressive patients. Absent flow in
jugular veins was significantly correlated with patients’ age (p<0.0001).
CONCLUSIONS: Sonographically defined CCSVI is common in MS patients.
However, CCSVI appears to be primarily associated with the patient’s age, and
poorly correlated with the clinical course of the disease.
Well this study finds a high frequency of CCSVI in Msers, which is more
related to age than disease. There is clearly controversy in the air still, but
is the phenomenon more a consequence of disease and age than causal.
Although it is debated whether chronic cerebro-spinal venous insufficiency
(CCSVI) plays a role in multiple sclerosis (MS) development, many patients
undergo endovascular treatment (ET) of CCSVI. A study is ongoing in Italy to
evaluate the clinical outcome of ET. Severe adverse events (AEs) occurred in
15/462 subjects at a variable interval after ET: jugular thrombosis in seven
patients, tetraventricular hydrocephalus, stroke, paroxysmal atrial
fibrillation, status epilepticus, aspiration pneumonia, hypertension with
tachicardia, or bleeding of bedsore in the remaining seven cases. One patient
died because of myocardial infarction 10 weeks after ET. The risk of severe AEs
related to ET for CCSVI must be carefully considered.
procedure, it is not high but it is not trivial and the question remains, it is
an unproven therapy.
I was not going to publish abstracts but these add to the mix.
[P05.177] Fox R et al. An Assessment of Chronic Cerebrospinal
Venous Insufficiency in MS
OBJECTIVE: To conduct an independent assessment of chronic cerebrospinal
venous insufficiency (CCSVI) in MS.
from the head, with conflicting results from different studies. Recent studies
have found a very low prevalence of CCSVI, suggesting that those investigators
were performing ultrasound assessments differently than the original
performed ultrasound assessments on a group of 61 MS subjects (4 CIS, 28 RRMS,
19 SPMS, 10 PPMS; 42 females) and 20 non-MS controls (15 healthy and 5 other
neurological diseases; 10 female). Ultrasonographers were blinded to diagnosis,
and separate research staff positioned subjects prior to ultrasonographer
arrival. Assessments were performed using a Biosound MyLab25, equipped with
Quality Doppler Profiles (QDP) technology, and traditional transcranial
Doppler. Two published interpretations of CCSVI Criteria were utilized: Narrow
Criteria did not include either B-mode intraluminal abnormalities or QDP
technology for deep cerebral vein reflux, while Broad Criteria included both of
significant differences between MS subjects and controls (p>0.5 for both
comparisons). In both groups, there was a doubling of the proportion of
subjects meeting CCSVI criteria when using the Broad Criteria.
CONCLUSIONS: Using trained and blinded ultrasonographers and QDP
technology, we observed no difference in the proportion of MS subjects meeting
CCSVI criteria compared to non-MS controls. Different interpretations of CCSVI
criteria altered the proportions of subjects meeting CCSVI criteria,
highlighting the importance of criteria interpretations when comparing the
prevalence of CCSVI between studies. These observations do not support a significantly
increased prevalence of CCSVI in MS and suggest against a pathogenic role of
CCSVI in MS.
You can read the conclusions!
[P05.183] Met L et al. Chronic Cerebrospinal Venous Insufficiency
and Multiple Sclerosis: Changes in Treatment Patterns and Opinions in a
OBJECTIVE: We aimed to describe the population of Multiple Sclerosis
(MS) patients reporting chronic cerebrospinal venous insufficiency (CCSVI)
treatment and to describe the change in treatment patterns and opinions over
Albertans have travelled out-of-country for venous angioplasty.
longitudinal observational study that uses online questionnaires to collect
patient-reported information about the safety, experiences, and outcomes
following CCSVI treatment. All Albertans with MS have been encouraged to
participate, irrespective of treatment status. Enrollment is ongoing.
years, 76.5% were female, and 63.8% had relapsing remitting MS; 152
participants (20.7%; 95% CI: 17.9-23.9%) reported having CCSVI treatment,
beginning in March 2010. Participants were more likely to have undergone
treatment in 2010 (66.4%; 95% CI: 58.3-73.9%, n=101) than in 2011 (30.9 %; 95%
CI: 23.7-38.9%, n=47), even after controlling for the period of enrolment.
Between January and June 2012 only four participants had CCSVI treatment (2.6%;
95% CI: 0.7-6.6%). Older age, male sex, a progressive course, and greater
disability were more common in those who had CCSVI treatment.
This may indicate that patients who wanted and could afford out-of-country
treatment went soon after the CCSVI hypothesis was widely publicized. However,
this may also reflect declining patient interest after they observed the
outcomes in this earlier group of patients. The sociodemographic and clinical
characteristics of participants who received CCSVI treatment will be compared
to those who did not receive treatment. Factors that influenced participants’
opinions for or against having CCSVI treatment will be compared over time
You can read the conclusions!
[P01.182] Baharnoori M et al. Treatment for Chronic Cerebrospinal
Venous Insufficiency in Patients with Multiple Sclerosis: Patient-Reported
OBJECTIVE: To assess changes in multiple sclerosis (MS) associated
symptoms and disability scores (EDSS) in patients with MS after endovascular
been proposed as the causal factor for MS. Contradictory data on the
association between CCSVI and MS have been reported to date. CCSVI was defined
as impaired extra cranial cerebrospinal venous drainage which leads to the
accumulation of cerebral iron deposits causing inflammation and degeneration.
their MS symptoms after ET including fatigue, sensory deficits, impairments in
mobility, coordination, bladder control and cognition. First, we examined
symptom changes within 2 weeks after treatment compared to before. For
longitudinal assessment, we divided patients to 3 groups; patients who had ET
1) within past 6 month 2) 6-12 months or 3) more than 12 months. Changes at the
time of interview were compared to those before the ET. Their EDSS score was
measured before and after ET and analyzed using student t test.
fatigue. About two-thirds reported improvement in cognition (38/65), mobility
(51/79) and perceived warming in their limb temperature (40/63). Half of
patients reported improvement in bladder control (34/73), coordination (37/73)
and sensory deficits (28/61). Longitudinal assessment of symptoms revealed that
initial reported improvement in most symptoms greatly diminished over time.
Furthermore, we did not find any significant difference between EDSS scores
before and after the ET (P=0.828).
subjective reports of improvement of various symptoms by many patients without
any corresponding objective change in neurological evaluations as measured by
neurologist-derived EDSS scores. These uncontrolled and unblinded observations
do not provide any credible evidence of a true benefit from ET for MS.
However remember the cannabinoid trials there were subjective improvements
reported by MSers, but no objective benefits in spasticity scales. They changed
the way they do trials listened to MSers and Sativex was born
However I wonder whether the writing is on the wall with regard to the results
of the blinded trials?
Pryse-Phillips W, Stefanelli M, Murphy-Peddle K, Barrett B.An Observational Study of Venoplasty in
Patients with Multiple Sclerosis. Can J Neurol Sci.
sclerosis (MS) have journeyed abroad to avail themselves of ‘liberation
therapy’ (venoplasty) following the initial report by Zamboni et al in 2009.
That study also led to public pressure upon Departments of Health in Canadian
Provinces to fund the procedure. The present study was done in order to advise
the Government of Newfoundland and Labrador as to whether or not it should do
Methods: We conducted an observational study of 30 MS subjects who had
submitted to venoplasty, using objective, semi-objective and subjective
Results: Significant subjective improvement was reported by half of the
subjects at three months, although the degree of perceived improvement was less
at 12 months. The objective and semi-objective tests employed did not indicate
improvement in any area over the one-year follow-up period. Seven of the 29
subjects in whom CT venography was performed at the end of the study year were
found to have uni- or bilateral occlusion or >50% stenosis of at least one
cervical draining vein, but they showed no deterioration in their clinical status
compared to those in whom no venous occlusion nor stenosis was found.
Conclusion: No objective improvement was found at one year in thirty MS
subjects who had undergone venoplasty, although many reported a degree of
This study offers some encouragement in that some improvements are felt
after venoplasty but the effect was largely transient and was not seen by the
neuro. Restenosis was common. However is this a disaster zone for the Brave
Dreams trials? This I think is set to run that are set to run over 12 months.
policy: MS and evidence from the CCSVI Trenches” BMC Med Ethics.
2013 Feb (1):6.
BACKGROUND: In 2009, Dr. Paolo Zamboni proposed chronic cerebrospinal
venous insufficiency (CCSVI) as a possible cause ofmultiple sclerosis (MS).
Although his theory and the associated treatment (“liberation
therapy”) received little more than passing interest in the international
scientific and medical communities, his ideas became the source of tremendous
public and political tension in Canada. The story moved rapidly from mainstream
media to social networking sites. CCSVI and liberation therapy swiftly garnered
support among patients and triggered remarkable and relentless advocacy
efforts. Policy makers have responded in a variety of ways to the public’s call
DISCUSSION: We present three different perspectives on this evolving
story, that of a health journalist who played a key role in the media coverage
of this issue, that of a health law and policy scholar who has closely observed
the unfolding public policy developments across the country, and that of a
medical ethicist who sits on an expert panel convened by the MS Society of
Canada and the Canadian Institutes of Health Research to assess the evidence as
SUMMARY: This story raises important questions about resource allocation
and priority setting in scientific research and science policy. The growing
power of social media represents a new level of citizen engagement and
advocacy, and emphasizes the importance of open debate about the basis on which
such policy choices are made. It also highlights the different ways evidence
may be understood, valued and utilized by various stakeholders and further
emphasizes calls to improve science communication so as to support balanced and
An interesting read, it is open source so I will not spend time commenting
on this but take a few quotes as food for thought.
“In the end, one thing that journalism and science—two disparate
professions—have in common is that they are self-correcting over time. It’s not
always a pretty process but it is a necessary and informative one”.
“The rapidity with which new findings, whether speculative or proven, make
their way into the public sphere has undergone a paradigm shift such that the
process in which “evidence” is manufactured may be changing irrevocably.”
“Gone are the days when researchers and clinicians can rely on a few hours
of “media training” to prepare them for the off-chance they might be
interviewed about some aspect of their work…….. the advent of the internet
and social media mean the ivory tower of academia might be stormed at any
moment by an interested, enthusiastic, and motivated public. Researchers and
clinicians must learn how to utilize these resources to ensure the message that
emerges is both balanced and informed.”
This reminds me of the debate that Prof G lost on whether Academia should
engage with the Social Media!