when to consider neurosurgical interventions for the management of complicated cryptococcal...
Post on 20-May-2015
805 Views
Preview:
DESCRIPTION
TRANSCRIPT
The UC San Diego AntiViral Research Center sponsors weekly presentations by infectious disease clinicians, physicians and researchers. The goal of these presentations is to provide the most current research, clinical practices and trends in HIV, HBV, HCV, TB and other infectious diseases of global significance. The slides from the AIDS Clinical Rounds presentation that you are about to view are intended for the educational purposes of our audience. They may not be used for other purposes without the presenter’s express permission.
AIDS CLINICAL ROUNDS
Neurosurgical considerations in the management of complicated cryptococcal meningitis
Edward Cachay M.D., M.A.S
Associate Professor of Clinical Medicine
Owen clinic -9 November 2012
copyright to Edward Cachay MD, Nov 2012
Friday 5:15pm-arrival to the emergency department
• 26 yo male presented with 1 mo of headache , hearing loss x 3 weeks and reporting and double vision on the ED.
• The patient was unable to communicate 2/2 hearing loss and unable to read 2/2 diplopia.
• His mother was at bedside and gave all history
• The patient also had complained of generalized weakness with some unsteadiness with walking.
• There was no history of fever, chills, vomiting, photophobia .
PMH: None including prior STI, no surgeries.
NKDA
Meds: none
SH: Patient lives in TJ, visiting his family in Chula Vista. Denies tobacco or illicit drugs. Social EtOH.
FH: unremarkable
copyright to Edward Cachay MD, Nov 2012
Physical exam VS: BP 147/94 | Pulse 113 | Temp 98.3 °F | Resp 16 | Ht 6' 0.25" | 172lb | BMI 23.2 kg/m2 | SpO2 98%
• Patient was fully awake in NAD, responded to written instructions and denied headache but expressed concerns with signs about deafness and decreased vision in the right eye.
• NAD, WDWN • Dilated pupil more left than right (4mm) slowly reactive. No oral candida, clear ear
drums, normal gingiva, OP/NP clear • Neck: mild stiff, supple, No LAD • CV: RRR, no m/g/r • Chest; CTAB • ABD: +bs,s,nt, no palpable spleen • Genitals: No discharge, no hernias • Extrem: No e/c/c • Neuro: AAOx3,pupil more left than right (4mm) slowly reactive, VI palsy bilateral.
deafness, mild hyperreflexia, no babinski, meningeal signs +. Fundoscopic exam: Bilateral papilledema. Left side flames and more prominent.
• Proximal weakness lower extremities with evidence of incoordination • SKIN: No rash
copyright to Edward Cachay MD, Nov 2012
Laboratory results available on ER
6.6 14.1
191
38.9
135
2.8
93
25
10
0.58
107 39
18 4.2
9.3 TB: 1.1
Rbc: 4; wbc: 3, TP: 41, Glucose: 46
7:50 pm Medicine resident present case. OP is reported > 55cmH20. 45cc drained, still OP > 55cmH20. Ambisome + 5FC initiated.
India ink: Positive
CSF analysis:
DB: 0.3 133
copyright to Edward Cachay MD, Nov 2012
Head CT performed on arrival to ER
Axial Coronal
copyright to Edward Cachay MD, Nov 2012
Head CT on arrival to ER. Have you noticed the papilledema?
copyright to Edward Cachay MD, Nov 2012
5:15am Patient tells me he has no double vision but can’t see with his right eye and left eye vision is blurry.
In addition to start antifungal therapy, what would you have done if you were at the bedside at 5:00am?
1. Transfer patient to ICU for frequent neurocheck
2. Consult neurosurgery
3. Daily CSF opening pressure measurement
4. All above
5. None of the above
copyright to Edward Cachay MD, Nov 2012
7:35 am: The neurosurgery team documented
“Pt current symptoms are focal in nature and does not appear to have altered sensorium, denies significant HA at present time. Does not appear to have symptomatic intracranial hypertension currently.”
a. decadron 10 mg x 1 then 4q6
b. MRI brain and c-spine with and w/o contrast
c. recommend continuing daily high volume LP's
d. Agree with transferring to ICU
copyright to Edward Cachay MD, Nov 2012
Do you agree with using high dose steroids in this clinical situation?
a. Yes
b. No
copyright to Edward Cachay MD, Nov 2012
The data of using steroids in HIV-related cryptococcal meningitis
Steroids (n=41)
Not steroids (n=191)
P
2w successful clinical response 41% 86% 0.001
Negative csf fungal cultures at 2 weeks
41% 62% 0.001
Graybille R at al. CID, 2000, 30:47-54
Dexamethasome or Metilprednisolone (n=41)
Other steroids (n=200)
P
Mortality within 2 weeks 20% 3% 0.0001
copyright to Edward Cachay MD, Nov 2012
Steroids have no benefit and may create more problems:
copyright to Edward Cachay MD, Nov 2012
The burden of disease was better known when patient is in the ICU
Blood culture: 1 of 4 bottles positive for cryptococcus
csf cultures: grew Cryptococcus spp. within 2 days even in routine media
Rbc: 4; wbc: 3, TP: 41, Glucose: 46
csf CRAG: 1: 8,182
India ink: Positive CSF analysis:
copyright to Edward Cachay MD, Nov 2012
CD4: 36 and HIV VL= 1’215,713
Potential mechanism (s) behind the patient symptoms. Which one do you think is the most important at this point?
1. Elevated CSF pressure
2. Cryptococcomas
3. Vascular infarcts/vasculitis
4. Nerve infiltration with Cryptococcus.
5. Meningeal irritation
copyright to Edward Cachay MD, Nov 2012
Brain MRI Hospital Day #2
copyright to Edward Cachay MD, Nov 2012
Brain MRI Hospital Day #2: Figure Depicts normal VII nerve different nuclei and tracts
copyright to Edward Cachay MD, Nov 2012
Left auditory canal illustrating normal VII and Vestibulo-coclear nerve
copyright to Edward Cachay MD, Nov 2012
Progression of Intracranial hypertension
Back to Medicine Owen
copyright to Edward Cachay MD, Nov 2012
Fundoscopic exam Hospital day #10
copyright to Edward Cachay MD, Nov 2012
Ocular exam Hospital day #11
copyright to Edward Cachay MD, Nov 2012
Clinical course:
• The patient underwent a V-P shunt placement on Hospital day #12
• At the time V-P shunt placement last csf positive cultures was from day 3. csf obtained on day 5 and 6 were no growth and still do until today
• Steroids were fully stopped hospital day #14
• Patient completed a total of 19 days of Ambisome + 5FC (14d from most recent documented negative csf culture). Therapy was limited due to AKI (creatinine up to 2.1)
• Patient was discharged on hospital day #21
• CSF culture obtained from ventricles during V-P placement grew after 10 days of collection after patient was discharged home.
copyright to Edward Cachay MD, Nov 2012
CSF flow
copyright to Edward Cachay MD, Nov 2012
Figure below depicts normal dynamic circulation of Cerebrospinal fluid
copyright to Edward Cachay MD, Nov 2012
Downloaded from http://en.wikipedia.org/wiki/Cerebrospinal_fluid
copyright to Edward Cachay MD, Nov 2012
Loyse AIDS 2010, 24:405-410
Aracnoid granulation anatomy
copyright to Edward Cachay MD, Nov 2012
Loyse AIDS 2010, 24:405-410
It was not until recently that we had histophatological prove of mechanism associated to elevated ICP in HIV related cryptococcal meningitis
copyright to Edward Cachay MD, Nov 2012
Loyse AIDS 2010, 24:405-410
Multiple organism filling aracnoid granulations
copyright to Edward Cachay MD, Nov 2012
Loyse AIDS 2010, 24:405-410
A plumbing system with increasing resistance
copyright to Edward Cachay MD, Nov 2012
o
o
The mesh get clotted
copyright to Edward Cachay MD, Nov 2012
Eschematic representation of cryptooccal yeast; (5mm) diameter
Outcome of treatment according to baseline CSF opening pressure for 221 patients with AIDS
and cryptococcal meningitis.
Graybill J R et al. Clin Infect Dis. 2000;30:47-54
copyright to Edward Cachay MD, Nov 2012
Baseline CSF opening pressure does not correlate with mortality when frequent lumbar punctures are done
copyright to Edward Cachay MD, Nov 2012
Bicani et al, AIDS. 2009;23:701–6
Scatter plot of baseline cryptococcal CSF Colony forming units count vs baseline opening pressure
copyright to Edward Cachay MD, Nov 2012
Bicani et al, AIDS. 2009;23:701–6
Definition of complicated cryptococcal meningitis
• Death is not the only relevant outcome of this opportunistic infection .
• Our group has worked in incorporating definitions of complicated cryptococcal meningitis:
I. death but also incorporates
II. two elements of long term morbidity:
(1) persistently (≥ 14 days) abnormal neurologic exam
either by altered mental status or focal neurologic
findings,
(2) surgical intervention to control intractable intracranial
hypertension. Cachay et al. AIDS Research and Therapy, 2010, 7: 29
copyright to Edward Cachay MD, Nov 2012
Clinical features at baseline in patients with cryptococcal meningitis-Owen clinic
copyright to Edward Cachay MD, Nov 2012
Uncomplicated
cryptococcal meningitis
n = 68
Complicated
cryptococcal meningitis
n = 14 P value
Meningeal signs 12 (14.6) 8 (11.8) 4 (28.6)
Initial altered mental status(
scale ≤13) 15 (22.1) 6 (42.9) 0.18
Focal neurological findings 3 (4.4) 7 (50) 0.0001
Seizures 3 (4.4) 2 (14.3) 0.20
CSF opening pressure ( cmH20) 26.9 (5–57) 43.4 (15–61) 0.0001
CSF
wbc (/ml)
glucose(mg/dl)
protein (mg/dl)
49.9 ( 0–500)
40.7 ( 2–103)
77.9 (27–278)
26.3 (0–210)
45.8 (11–122)
73.9 ( 25–178)
0.36
0.34
0.79
CSF India ink positive 57 (85) 14 (100) 0.20
CSF culture positive 64 (97) 14 (100) 1.0
Blood culture positive for
Cryptococcus species 35 (75) 8 (80) 1.0
Cachay et al. AIDS Research and Therapy, 2010, 7: 29
Recently reviewed IDSA guidelines:
copyright to Edward Cachay MD, Nov 2012
Practical points without clear guides:
- Even in clinical trials controlling ICP aggressively median number of LPs were 8 within first 2 weeks
- After how long should be considering placing a definitive neurosurgical shunt?
- Are all patients the same? What if they have concurrent focal complications such as in our case?
copyright to Edward Cachay MD, Nov 2012
Why is this important?
• In our institution over the last 22 years approximately 1 of 7 ARV naïve HIV patients presenting with a new diagnosis of cryptococcal meningitis had a complicated course.
• Approximately 1 of 2 patients presenting with complicated cryptococcal meningitis required a neurosurgical shunt procedure.
Cachay et al. AIDS Research and Therapy, 2010, 7: 29
copyright to Edward Cachay MD, Nov 2012
Risk associated to V-P shunt placement
+ Immediate:
-- Mechanical complications:
Vascular
Structural
-- Infection:
Primary: Seeding Cryptococcus into the peritoneum
Secondary: Superimposed bacterial infection
+ Delayed:
-- Shunt extrusion
-- Infection
copyright to Edward Cachay MD, Nov 2012
Clin Infect Dis. 2003 Sep 1;37:673-8
copyright to Edward Cachay MD, Nov 2012
Patients with acute decompensating and rapid interventions had better outcomes
Age/gender Symptoms CSF OP baseline
CSF OP highest
Time to VP shunt
Outcome
19/M AMS, L VI palsy 60 >60 10d Recovery
71/M AMS and decrease VA
33 36 4d Recovery
25/F AMS, decrease VA
14 60 15d Recovery
57/F Decrease VA and hearing loss
40 60 24d Deafness persisted
Clin Infect Dis. 2003 Sep 1;37:673-8
copyright to Edward Cachay MD, Nov 2012
HOW SOON CAN NEUROSURGICAL SHUNTS BE PLACED ?
copyright to Edward Cachay MD, Nov 2012
Earlier evidence from 1980s Procedure Complications Outcome
1 VP shunt no Good
2 VP shunt no Good
3 VP shunt 6 weeks after craneotomy
Block shunt, 3 times Died from uncontrolled infection
4 Subtemporal descompression no Good with rapid recovery of vision
5 External descompression, VP shunt 1w later
Block shunt, 3 times Good
6 External ventricular drainaga, VP shunt 1 we later
no Good
7 VP shunt Block shunt, once Good
8 External ventricular drainaga, VP shunt 1 we later
no Good
9 VP shunt Block shunt, once Severe dsiability (blind and partially deaf)
10 External ventricular drainaga, VP shunt 1 we later
no Good
11 VP shunt No Good
Chan et al, Neurosurgery, 1989, 25:44-8 copyright to Edward Cachay MD, Nov 2012
Park et al Clin Infect Dise.1999 Mar;28(3):629-33
Shunts can be placed in context of active infection
copyright to Edward Cachay MD, Nov 2012
We know that patients with a baseline focal neurological exam have the highest risk for developing complicated forms of cryptococcal meningitis
Shall we more aggressive in these individuals?
copyright to Edward Cachay MD, Nov 2012
Risk factors for developing complicated cryptococcal meningitis within 2 weeks of admission-Owen clinic
Cachay et al. AIDS Research and Therapy, 2010, 7: 29
copyright to Edward Cachay MD, Nov 2012
Risk Factor Unadjusted OR (95% CI) p Adjusted OR (95% CI) p
Baseline focal neurologic findings 21.7(3.7-149.3) .00001 17.2(2.6-114.9) .003
Initial CSF opening pressure ≥30 cmH20 4.3(1.1-19) .01 1.9(0.36-10.7) .44
Baseline log2 csf CRAG 1.5(1.1-2.2) .02
Initial abnormal head CT 17.7(1.2-944) .002 32.6(1.1-927.8) .04
Model N = 80, ROC area 0.92, Hosmer-Lemeshow c2 p < 0.00001
Limitations in HIV patients
+ The risk of shunt infection in the context of severe immunosuppression, and peritoneal Cryptococcus seeding from direct transport of infected fluid has historically discouragedsurgeons from implanting CSF shunts in patients with HIV and cryptococcal meningitis.
+ To date, only 9 cases of ventriculoperitoneal (VP) shunt placement in HIV-infected patients with elevated ICP and cryptococcal meningitis without hydrocephalus have been reported in the English literature. However 4 cases of L-P shunts placements in patients with ocular complications were reported with documentation of reversibility of symptoms when shunts were placed promptly.
copyright to Edward Cachay MD, Nov 2012
Our experience at UCSD –Owen clinic
copyright to Edward Cachay MD, Nov 2012
Characteristics of patients with cryptococcal meningitis that required neurosurgical shunting at the Owen clinic in last 22 years
Age
(years)
CD4 CSF OP
(cmH20)
Meningeal
signs
Focal
findings
+
India
ink
+ blood
Cx
csf
CRAG
AMS CT focal
finding
Outcome
1 28 126 37 1 Yes yes yes 32768 0 0 alive
2 25 9 51 1 yes yes yes 8192 1 1 alive
3 35 50 13 0 0 yes yes 32768 0 0 alive
4 35 22 30 0 0 yes yes 32768 0 0 alive
5 48 76 45 1 0 yes yes 32768 0 0 alive
6 27 9 20 0 yes yes yes 256 1 0 alive
7 33 20 27 0 0 yes yes 65536 0 0 alive
8 43 17 > 55 0 yes Yes Yes 32768 0 0 alive
9 45 5 > 55 1 yes yes yes 4096 0 0 alive
10 47 2 >55 0 No yes unkn unkn 0 0 alive
Copyright Edward Cachay M.D. November 2011
Cachay et al-Owen clinic unpublished data
copyright to Edward Cachay MD, Nov 2012
Clinical observations
• Every patient who had ≥ 5 large volume LP within first 14 days and still had elevated ICP required ultimately a shunt intervention
• Patients who had acute AMS descompensation (i.e posturing, decortication) required shunt despite initial trials of ventriculostomy or lumbar drain placements.
• Promptness of intervention appear to matter for patients with visual impairment.
copyright to Edward Cachay MD, Nov 2012
Outcomes:
• Most patients who required a CSF surgical shunt placement had the intervention done during their third week of hospitalization (median: day 21, range: day 5 to 30)
• No immediate or late surgical infections were recorded
• All except one (shunt placed in 2012) patients remained alive after a median of 5 years of follow-up
copyright to Edward Cachay MD, Nov 2012
and what happen with our patient?
copyright to Edward Cachay MD, Nov 2012
25 days after shunting
copyright to Edward Cachay MD, Nov 2012
25 days after shunting
copyright to Edward Cachay MD, Nov 2012
25 days after shunting
copyright to Edward Cachay MD, Nov 2012
The current status
• The indications for shunting in HIV-related cryptococcal meningitis are not well understood or universally agreed upon.
• Most groups suggest early shunt placement for hydrocephalus
to avoid irreversible neurological complications
• There are lack of practical clinical rules for consideration of neurosurgical shunt placement and initiate –often long- conversations with neurosurgery team
copyright to Edward Cachay MD, Nov 2012
Our clinical observations suggest that patients may benefit from neurosurgical placement if:
1. Patients have persistent csf OP >35cmH20 and no AMS:
+ After 7 days on treatment with minimum 6 large volume LPs
+ After 11 days of therapy and minimum 5 large volume LPs
2. Patients with sensory-neural focal findings (blindness and deafness) and negative with MRI evidence of nerve infiltration to increase changes of irreversible damage.
3. Patients with acute deterioration of mental status will benefit from urgent shunting when other alternative causes are immediately rule out.
copyright to Edward Cachay MD, Nov 2012
Conclusions
• A subset of patients with complicated meningitis will benefit from neurosurgical shunting to prevent irreversible neurological damage.
• Shunt insertions are not associated with spread of infection, do not prevent mycological cure, and infrequently require late revisions.
• Future collaborative efforts are needed to define prospectively the proposed indications for shunt placement.
copyright to Edward Cachay MD, Nov 2012
Acknowledgements I
copyright to Edward Cachay MD, Nov 2012
Acknowledgements II
• Justin Brown (Neurosurgery)
• Scott Pannel (Radiology)
• Jeffrey Lee (Opthalmology)
• Amy Sitapati, Theo katsivas and Joe caperna
• Nina Haste (Retro)
• Wollelaw Agmas (Owen research )
copyright to Edward Cachay MD, Nov 2012
In HIV Negative patients: it is not uncommon to have severe
Sex/age (yr) Presenting Neurological exam GCS Head CT
1 F/22 HA, diplopia Papilledema, 6th palsy 15 Hydrocephalus
2 M/15 HA, fever Meningismus 15 Hydrocephalus
3 F/54 HA, decrease visual Decrease vision, hypopituitarism 12 Intrasellar Cyst
4 M/32 HA, fever, blindness Meningismus, papilledema, blindness
12 Diffuse cerebral edema
5 M/24 HA, fever Ataxia, Papilledema, 6th palsy 12 Posterior fossa cyst
6 M/31 Fever, drowsiness Meningismus, papilledema 12 Hydrocephalus
7 F/60 Acute confusion Meningismus 10 Hydrocephalus
8 M/33 Coma, fever Meningismus 7 Hydrocephalus
9 F/36 Coma, fever Meningismus, papilledema 3 Hydrocephalus
10 M/28 Coma, fever Meningismus, 3 Hydrocephalus
11 M/9 Coma, fever Meningismus, 3 Hydrocephalus
Chan et al, Neurosurgery, 1989, 25:44-8 copyright to Edward Cachay MD, Nov 2012
top related