Andrew L Callen MD
@AndrewCallenMD
Followers
1,407
Following
405
Media
55
Statuses
698
Associate Professor, Neuroradiology - Director, CU CSF Leak Program - University of Colorado Anschutz Medical Campus - Alumni: UCSF - #CSFLeak #NeuroRad
Denver, Colorado
Joined January 2020
Don't wanna be here?
Send us removal request.
Explore trending content on Musk Viewer
Garbage
• 1310855 Tweets
Joe Biden
• 624617 Tweets
River
• 384302 Tweets
Valencia
• 367918 Tweets
#nicetwoMeatuxLingOrm
• 233844 Tweets
LINGORM N2U LIVE
• 228398 Tweets
Yankees
• 218401 Tweets
ポケポケ
• 82968 Tweets
CLIKCLAK MV OUT NOW
• 73017 Tweets
#BABYMONSTER_CLIKCLAK_MV
• 63672 Tweets
Warriors
• 62988 Tweets
Borja
• 60025 Tweets
Camila
• 54721 Tweets
Gallardo
• 52455 Tweets
MOMENTS OF LIFE FREEN BECKY
• 51927 Tweets
Volpe
• 48212 Tweets
ヤンキース
• 47057 Tweets
Luana
• 28930 Tweets
트리플스타
• 27603 Tweets
ポケモンカード
• 17912 Tweets
初恋の日
• 14056 Tweets
Fokus Bekerja Untuk Rakyat
• 12634 Tweets
#DiwaliCelebration
• 11537 Tweets
#刀剣乱舞ONLINEもうすぐ十周年
• 10579 Tweets
会派入り要請
• 10567 Tweets
@drclairetaylor
Very interesting. Our recent study also suggests that there may be a link between long covid and endothelial dysfunction:
9
123
641
Lumbar puncture with a ventral through and through 1-2 mm dural tear resulting in years of leak suffering for this patient. Very challenging dynamic CTM and surgical localization - a good reminder to please use the smallest, non cutting spinal needles possible if an LP is needed
11
48
183
#SIH
due to a dural tear after chiropractic manipulation. MRI: sag and an extradural collection (green). Dynamic CT myelography: ventral dural defect (yellow) 2/2 osteophyte (red). We took a TRANSDELTOID approach to the ventral epidural space for fibrin glue patch.
@AsheshThaker
14
26
108
We all love seeing the
#CVF
drain into the paraspinal segmental vein for that "classic" look, but don't forget about the internal epidural venous plexus! Looks like a "dot" on axials and can be easily overlooked but coronals can be your friend.
0
27
105
Spent Black Friday performing Colorado's first endovascular occlusion of a CSF venous fistula with Dr. Adam Schwertner at
@DenverHealthMed
. Grateful to
@WBrinjikji
for pioneering this technique for our patients.
#SIH
10
9
101
@dickiebush
I let them randomly percolate to the front of my attention by anxiety and chance.
7
3
100
Learned today of my promotion to Associate Professor! I’m so grateful to my many mentors who helped make this possible, including but not limited to:
@CMGlastonbury
@williamdillonmd
@vinil_shah
@JaredNarvid
@jf_talbott
@DrIanCarroll
@jodytanabe
25
4
101
Phase 2 feasibility testing and phantom scanning prior to clinical implementation of our dynamic CT myelography patient positioning device. My goal is to increase reproducibility, sensitivity, and patient safety in dynamic CTM.
#SIH
10
19
100
Happy to share our new
@AJNR
paper describing a novel positioning device for dynamic CTM CSF leak/fistula localization.
Thank you to everyone who supported me and continue to support my
#CSFleak
obsession, particularly
@jodytanabe
and
@CUneurorad
.
13
27
91
I am very happy to share our manuscript detailing our algorithm for workup/treatment of
#SIH
, emphasizing the importance of a multidisciplinary approach to care for our
#CSFleak
patients and a pathway for "imaging negative" individuals suffering from orthostatic headache.
New
@AJR_Radiology
Accepted Manuscript:
"Algorithmic Multimodality Approach to Diagnosis and Treatment of Spinal CSF Leak and Venous Fistula in Patients With Spontaneous Intracranial Hypotension"
By Dr
@AndrewCallenMD
& team
@CURadiology
1
16
55
6
24
79
Another
#SIH
patient told for years that his symptoms were all in his head. Turns out they were actually from a
#CVF
in his spine.
@VincentTimpone
@AsheshThaker
@CUneurorad
5
27
82
An important
#SIH
paradigm: the leaking patient with a dorsal epidural collection without ventral component. This young patient with no ventral osteophytes or ventral collection was found to have a fast lateral leaking cyst on decubitus dynamic myelography, treated with fibrin.
2
15
76
So proud of this multi-institution, international
#csfleak
collaboration!
@MarkMamloukMD
@NeuroradLal
@ThienHuynh15
@brainscandan
@VincentTimpone
David Butteriss
Jack Pattee
2
21
75
This is part of what motivates me to find leaks in my
#SIH
patients. The validation of their symptoms with irrefutable imaging evidence after sometimes years of being told they are crazy.
It's a good historical moment to reflect on the fact that M.S. was commonly called a "hysterical paralysis" conversion disorder until neuroimaging made it possible to see the lesions.
47
2K
5K
4
21
69
In this study we tried to understand which patients with a suspected
#csfleak
who do not meet ICDH-3 criteria for
#SIH
still benefit from epidural patching.
I’m very proud to have played a small part in this important study led by
@DrIanCarroll
6
23
71
Hot off the press:
Temporal Characteristics of CSF Venous Fistulas on Dynamic Decubitus CT Myelography: A Retrospective Multi-Institution Cohort Study
@vinil_shah
@AsheshThaker
@williamdillonmd
@VincentTimpone
@CUneurorad
@UCSFimaging
@TheAJNR
6
23
72
15 hours of flying to be in Hawaii for 48 hours, but was still one of the best trips for me- such an amazing meeting - I learned so much from so many amazing people in this field. Thank you
@WouterSchievink
for inviting me to speak.
@spinalCSFleak
#CSFleak
@DrIanCarroll
4
3
71
Cord herniation or arachnoid cyst? A common conundrum. Dynamic CTM can help! Arachnoid cysts will often fill in on delayed imaging, so obtaining early dynamic imaging is key to making the diagnosis, outlined beautifully in this case:
@NeuroRadSam
1
11
68
1. Spinal elastance correlates with specific brain MRI changes in
#SIH
2. Bern score maintains predictive validity on dynamic CTM (even when excluding pachymeningeal enhancement!)
3. Opening pressure (again) is a poor predictor of finding a leak/fistula
6
24
62
@WendeNGibbs
‘Left frontal encephalomalacia likely reflecting an old infarct.’ I don’t like using ‘chronic’ because it means old and ongoing, but I know this is an unpopular opinion.
7
0
58
When scapula blocks your path to patch the ventral
#CSFleak
, a little disco move can sometimes open things up just enough…
1
12
60
What is a 'good clinical story' for SIH, especially w/ CVF?
40% of our cohort lacked a 'classic orthostatic headache.'
We used cluster analysis to reveal distinct clinical and imaging patterns. Read our open-access study here:
6
24
62
It was so fun hosting
@SharathKumarGG7
this week in our CSF Leak Program. His passion to care for Indian patients suffering from CSF Leaks is self evident. India is so lucky to have such a dedicated physician!
Thank you
@spinalCSFleak
for sponsoring his trip!
5
11
56
It was an honor to help highlight some of the important papers in
#CSFleak
,
#SIH
, and
#PDPH
over the past several years in
@HeadacheJournal
- check our our open access review here:
2
16
56
We are very excited to host this unique symposium highlighting both patient and provider voices! More details to come soon!
🗓️Save the date!🗓️ Join
@AndrewCallenMD
and the Spinal CSF Leak Foundation for a unique one-day hybrid symposium Nov. 11th bringing patients and providers together to learn from one another. Stay tuned for registration info!
#BridgingtheGap
#becauseyourduramaters
1
10
41
2
17
56
Join me at my favorite meeting
@The_ASSR
to discuss my favorite topic and share the stage with some fantastic speakers!
@NeuroradLal
@dgleao
@nbefera
#ASSR24
0
12
54
We are so excited to welcome Dr. Samantha Petrucci MD PhD (
@NeuroRadSam
) to
@CUneurorad
and the CU CSF Leak Program. Dr. Petrucci trained at UCSF and has extensive experience in caring for patients with
#CSFLeaks
.
1
6
49
2
3
49
Cross-institutional collaboration with
@DukeRadiology
led to rapid, expedited care for a
#CSFleak
patient this weekend. Our patients do better when we work together!
1
0
47
I'm very thankful for this opportunity and grateful to be part of such a wonderful community.
Spinal CSF Leak Canada is very pleased to announce that
@AndrewCallenMD
has joined the organization’s medical advisory committee. Welcome aboard Dr. Callen and thank you for your dedication.
2
3
22
2
6
43
I was very honored to receive this award and owe it all to my awesome section for inspiring me every day!
Congrats graduating Neurorad fellows Shane Brennan, Dan Fuguet, Tyler Diener! Congrats Faculty of Year
@AndrewCallenMD
and Fellow Teacher of Year Shane B. Couldn’t ask for better colleagues .
@CUneurorad
@CURadiology
@VincentTimpone
@AsheshThaker
@dave_zander
@JMHonce
@VPotigailo
0
4
39
7
1
43
True clinical progress is driven by our technologists and nurses, the real stars behind the scenes. Their dedication is the secret to success. I'm just lucky to be part of this incredible team!
@CUneurorad
@uchealth
1
5
42
We are working hard to put together a unique program with an amazing lineup of both physician and patient speakers to build on last year’s event. More information coming soon!
Announcing our 2nd annual Bridging the Gap conference! This year’s theme is “Past, Present, and Future.” This TWO-DAY in-person & virtual conference will take place November 2-3, 2024, and will be free for patients. We'll be sure to let you know when registration opens!
1
10
25
2
13
42
Check out this new, open access, multi institution collaborative review on the role of epidural blood patching in CSF Leaks:
1
13
40
Amidst the buzz re: physician burnout and low job satisfaction, try to remember the brighter side. Yes, we face administrative burdens, high caseloads, and systemic challenges. But, we're granted a unique privilege: to infuse our daily work with profound purpose. 1/2
Physician burnout and fulfillment, by specialty.
Top left means higher professional fulfillment and lower burnout. What's neuroradiology doing right?
35
94
367
1
2
41
Happening now!
@EmmaSechrist
presenting her abstract (and accepted publication!) studying a potential association of
#CVF
with spinal osteoarthritis
@The_ASSR
3
12
40
So proud of Jen Mackenzie for sharing her story and teaching us about what it means to recover from a
#CSFLeak
. Her lecture really encompasses what this day is all about.
1
2
38
I always love the opportunity to discuss
#SIH
/
#csfleak
and was honored to share the stage with
@vinil_shah
@RADMAM2
and
@lubdha_shah
Excellent talk on intracranial hypotension and Csf leak from
@AndrewCallenMD
#ARRS23
@ARRS_Radiology
@CUneurorad
0
5
22
2
6
37
Such an honor to speak alongside these awesome neuroradiologists at
#RSNA22
. See you next year Chicago!
1
5
38
Thank you
@SimyParikh
and
@TJUHospital
for the invitation to speak on
#CSFleak
diagnosis and treatment! It was my honor and privilege to visit one of the top headache centers in the country.
@AndrewCallenMD
gave an amazing radiology grand rounds here
@TJUHospital
@JeffHeadacheCtr
on
#CSFleak
#SIH
. Spinal CSF leaks impact quality of life more than MS and functionality more than cancer! Luckily, many are treatable with the right intervention.
2
10
39
1
8
38
4
2
37
Kudos to
@MarkMamloukMD
for leading this project, highlighting the exponential growth of interest and understanding of spinal CSF leaks in the last few years.
@TheAJNR
in particular has published numerous wonderful contributions to the literature.
1
22
54
Thank you
@MohitAgNeurorad
and
@thecortexclub
for inviting me to join such a great organization dedicated to radiology education! (Olive likes the shirt too 🐶)
2
2
37
The best part of
#ASNR
is spending time with the people you look up to in your field. A lovely dinner with lovelier people. Thank you
@LindaGr4510
for organizing.
3
5
36
It was great to do some board review today with the brilliant UCSF radiology residents
@UCSFimaging
@RadsUcsf
- the future of radiology is bright!
1
1
36
Congratulations to
@EmmaSechrist
for winning the
@The_ASSR
Louis A. Gillula, MD Mentor Award for her fantastic
#CSFleak
project! I am so excited to see what great things you will do in your career!
1
4
36
When you think of dural venous sinus thrombosis, compressive ischemic brainstem injury, spinal siderosis, SAH, pial vascular enrogement, dural calcifications and calvarial hyperostosis, do you think of
#SIH
/
#CSFLeak
?
@vinil_shah
@williamdillonmd
0
11
32
2/2 I am reminded of this whenever I witness families celebrating a birthday in the hospital cafeteria. Life is precious and we are so fortunate to be partners in our patients' most vulnerable moments.
4
1
29
1 of my favorite memories from training: I came in early to find my attending - a world expert- preparing for a multiD conf reading a review on a disease he was the first to describe. I asked why, he said “I don’t know the most about this, I just had the most questions about it”
2
0
30
Please join us in person or virtually for this unique, free CME event featuring incredible patient lectures as well as didactic lectures from physicians across the country on all aspects of CSF leaks!
SNEAK PEEK: Our upcoming “Bridging the Gap” conference on Nov 11 features the voices of patients as well as providers. In this clip, Sarah talks about the importance of understanding that spinal CSF leak is more than just a headache.
Register:
2
12
38
3
11
31
We know the false localizing sign in
#SIH
posterior to C2 due to anatomic communication of the epidural space and posterior spinal soft tissues. This patient has a "reverse" false localizing sign, presenting after suboccipital crani with leaking duraplasty into epidural space!
4
7
30
A must read for a more nuanced understanding of a dimension of
#CSFLeaks
which is not well understood and deserves more attention!
@SimyParikh
✅ exited that my paper on rebound intracranial hypertension is published with
@SpringerNature
! Thank you
@mrobbinsmd
for recognizing the need to review this important link between high and low
#CSF
pressure
#headache
⭐️
#spinalcsfleak
#IIH
Open Access:
0
10
36
1
7
29
It was a great honor to lecture on
#SIH
today at CU Neurology Grand Rounds alongside
@WouterSchievink
and
@MariusLBirlea
. Thank you to all that attended.
@CUneurorad
0
7
29
It was so great to have
@BhavyaRShahMD
come speak to us about his incredible HIFU program and research. I was particularly grateful for his advice on creating a patient-facing clinic as a radiologist, very apropos as our
#SIH
clinic has opened this week!
2
4
29
It was such a privilege to interview my mentor, role model, and friend
@CMGlastonbury
for the
@TheASNR
.
0
3
28
Very grateful for my training at
@UCSFimaging
, and looking forward to the beginning of my career at
@CURadiology
!
Before he departs for a faculty position at
@CURadiology
, we'd like to share
#research
authored by Dr. Andrew Callen,
#RadRes
Class of 2019. Best of luck!
1
0
14
2
1
27
I'm so very proud of our rising superstar neuroradiologist
@DaveBhaumikRad
for leading this project and publishing his first-first author paper!
@CUneurorad
@curadresidents
@AndrewCallenMD
et al: ‘Noncontrast
#headCT
is unique in comparison to the broader scope of imaging.’
#medicalimaging
#computedtomography
0
0
4
1
4
28
Perhaps the greatest joy in my work is having a neurosurgical colleague like Dr. Lennarson. He shares some of his surgical
#CSFLeak
experience now:
3
4
26
I'm looking forward to discussing my favorite topic,
#SIH
and
#CSFLeaks
with
@ARRS_Radiology
! Registration info below:
Register for Wednesday's AJR Live Webinar with
@AndrewCallenMD
to learn about the first line appropriate imaging tests to order in a patient with suspected spontaneous intracranial hypotension.
1
5
11
1
6
26
A packed procedure day always puts me in a great mood! Great cases, hard working trainees, excellent staff, and lovely patients.
#SIH
@CUAnschutz
@CUMedicalSchool
0
2
26
@EmmaSechrist
led this project examining the spatial relationship of CSF Venous Fistula and spinal osteoarthritis!
@TheAJNR
@CUneurorad
Check it out:
2
12
25
New in the
@AJR
-
@NeuroRadSam
and I comment on a recent study published in
@jamanetwork
evaluating MRI signs of IIH:
Link to the study:
0
8
28
1
5
26
@jhoukMD
from
@DukeNeurorad
providing us with an important lesson on contextualizing MRI brain findings in
#CSFLeaks
1
4
25
"Remember the patient" is my favorite quote from one of my favorite teachers
@williamdillonmd
- not only in complicated spines but also in cases with lots of motion artifact, perhaps the most frustrating to read but often harbor pathology in the suffering patient.
Remember the patient who has pain is counting on you to help them find and cure their ailment and you may play a pivotal role. I love spine
4
3
32
3
0
24
Just had an ordering clinician ask if the brain MRI could be "dry" or if it should be with contrast... I paused but decided I like this term and will now use it and pretend I always have.
5
0
23
Thank you and see you next year!!
That’s a wrap! Thank you to all of our patient speakers, all of our provider speakers, all of our moderators, the University of Colorado Anschutz depts of neurology, neurosurgery, and neuroradiology, and our course director,
@AndrewCallenMD
!
5
3
33
1
2
24
"Hedging" in radiology can be frustrating to the clinicians reading our reports, but the expression of uncertainty is a necessary part of reporting. We examine which radiology subspecialties and which types of patients tend to have the most uncertainty:
2
4
24
So proud of our incoming fellow
@EmmaSechrist
and grateful to
@spinalCSFleak
for their generosity!
Spinal CSF Leak Foundation is thrilled to announce Dr. Emma Sechrist as the recipient of our Fellow Education Funding Award.
@AndrewCallenMD
1
4
20
1
2
23
Two things I am grateful for:
-
@JaredNarvid
and
@UCSFimaging
for developing my interest in CVR
-Our volunteers, many of whom suffer from long COVID and are not fully understood. Though different, I feel parallels to my
#SIH
patients. Maybe imaging can help provide an answer.
Dr. Callen's (
@AndrewCallenMD
) team assessed the association of prior
#COVID19
infection with cerebrovascular reactivity + vessel wall imaging abnormalities, and explored the association of CVR impairment with post-COVID neurologic conditions
#LongCovid
1
3
21
0
3
21
1
0
20
Brilliant work by
@NeuroradLal
and team!
📑 NEW PAPER ALERT 📑
@NeuroradLal
@dgleao
@brainscandan
@Neuroshadow
“We describe an imaging sign on T2-weighted images caused by CSF-flow egress at the site of the defect that may permit accurate prediction of the site of the CSF leak non-invasively.”
3
29
83
0
0
20
@LeviChazen
@williamdillonmd
@PeterGKranz
@mrobbinsmd
@TimAmrheinMD
@vinil_shah
@marcelmaya
@The_ASSR
The only thing more satisfying than finding a CVF is finding two CVF in one day!
#yesterdaywasagoodday
@MD_Uribe
@dfuguet86
1
5
19
#Coloradans
- have you or someone you know been infected with
#COVID19
, and had a blood clot, stroke, or heart attack? We are currently enrolling volunteers for an IRB approved MRI study evaluating the health of the blood vessels in your brain.
DM me for info!
@CUAnschutz
1
8
17
This was a fantastic lecture. Thank you to my alma mater for spotlighting
#SIH
and to Dr. Linda Gray
@LindaGr4510
for everything she has contributed to this field.
There are 2️⃣ ways to watch this year's T. Hans Newton Lecture - in person & online. Learn more 👇
In-person registration ➡️
Streaming link ➡️
2
0
9
0
3
19
Important information about long term risks of living with a leak to cite to our
#SIH
#CSFLeak
patients who might have "mild" symptoms and be averse to definitive surgical intervention.
Spontaneous spinal CSF leaks are a common cause of superficial siderosis. Chronic bleeding into the subarachnoid space is the cause and it can be seen in most types of CSF leaks, but especially ventral leaks.
@spinalCSFleak
@LivingwithSS
1
25
66
2
6
18
Thanks
@Dx_imaging
for covering my
@ARRS_Radiology
lecture!
Spine
#Radiology
Insights on Venous Fistula Localization and Cerebrospinal Fluid Leaks
@ACRRFS
@ARRS_Radiology
@RadiologyACR
@RSNA
@TheASNR
@The_ASSR
@AndrewCallenMD
@PennRadiology
@MontefioreRAD
@DukeRadiology
@YaleRadiology
@UABRadiology
#ARRS23
#RadRes
0
6
22
0
1
18
This hematoma sure looks like a pancreas... and is there a dilated duct? Should we recommend MRCP?
3
0
18
@mtbendermd
@TheAJNR
@The_ASSR
@jhoukMD
@PeterGKranz
@TimAmrheinMD
@WBrinjikji
In our experience most patients with CVF have normal opening pressure. Combined with the potential morbidity from PDPH, I would not be keen on performing an LP for OP alone.
1
3
19
Think twice before invoking a skull base dural AVF based on hyperintense ASL/TOF signal in the left sigmoid sinus- it might be jugular reflux!
@traviscaton
0
6
17
As gender-affirming facial feminization surgery is increasingly performed, so is preoperative planning CT. Radiologists have a key role in describing findings relevant to the surgical approach.
Check out our new article in AJR:
2
2
17
@WouterSchievink
@WBrinjikji
@JCGneuro
@TimAmrheinMD
@PeterGKranz
I have wondered if the fact that we scan in the supine position has anything to do with this. May elicit some subtle findings if the patient was upright?
2
0
17
We use 4D-flow MRI cerebral vasoreactivity testing to illustrate the underlying pathophysiology of Moyamoya disease and reveal the intracranial flow changes that occur following surgical bypass:
@NeurosurgUCSF
@CURadiology
@UCSFimaging
0
6
15
@BrentWeinberg
The only thing more important than arguments over minor semantic distinctions are arguments about arguments about minor semantic distinctions.
3
1
16
Huge congrats to superstar
@CUMedicalSchool
student
@RyanATurner
for taking the lead on the case and publishing his first- first author paper! An excellent neuroradiologist in the making!
0
4
15
@PeterGKranz
On all the ones I have seen, you could make the call on the MRI, and with increased confidence if you have 3DT2FS acquisition. Sometimes the finding is so tiny however that it is more convincing in retrospect once you see it fill with contrast.
2
2
15
@WouterSchievink
is a very gracious host and even better teacher and friend! We are lucky guests.
It is a pleasure and a lot of fun hosting
#PeterLennarson
and
@AndrewCallenMD
here at
@CedarsSinai
. Learning a lot from each other.
@spinalCSFleak
2
7
58
0
0
15