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CORNEA CLINIC
INTERACTIVEMassimo Busin
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DIFFERENTIAL DIAGNOSIS
Infections Ocular Surface
Diseases Immunologic
Diseases Tumors Dystrophies and
Degeneratons
History Associated Diseases
(ocular and extraocular)
Characteristics of the Lesion (site, morphology, number)
DIFFERENTIAL DIAGNOSIS
CLINICAL HISTORY
Onset Duration Response to
Treatment Previous Eye
Surgery
ASSOCIATED DISEASES
Ocular Innervation Eyelids
(Trichiasis) Adnexa (Tear
Production) Sytemic Diseases
MYTH # 1:CORNEAL ULCER = INFECTION
CORNEAL INFECTIONS
FACT # 1:DIFFERENT MECHANISMS !!!
Microbial ActivityComplement (Immune-Complexes)Mechanical ActionExposureNeurotrophic Damage
CORNEAL INFECTIONS
MYTH # 2:ULCER TREATMENT = ANTIBIOTICS
CORNEAL INFECTIONS
FACT # 2:DIFFERENT TREATMENT !!!
Antibiotics Steroids Lid Surgery (Lubricants)
CORNEAL INFECTIONS
SITE OF THE LESION !!!Periphery Center
Imm. Mech. Infection
Sup. 1/3 Inf.1/3
UpperEyelid
ExposureTrichiasis
DIFFERENTIAL DIAGNOSIS
SITE OF THE LESION !!!
Peripheral
Immunologic Mechanism
DIFFERENTIAL DIAGNOSIS
Mooren’s Peripheral Ulcer
Uni- or BilateralAutoimmunePrevious TraumaNegative Serology
(R.A. -)
Peripheral Ulcer in R.A.Peripheral Ulcers Are
Sustained by an Immunologic Mechanism (Antigene-Antibody Complexes with Complement Activation)
Staphyilococcal Infiltrates/UlcersBLEPHARITIS with Growth of Staphylococcus Species and Formation of Immune Complexes (Endotoxin - Antigen)
Steroids Block the Formation of Immune Complexes. TETRACYCLINES Are Causative Treatment !!! Other Antibiotics Are Less Effective
Acnes Rosacea
Blepharitis
HYPERMETROPIA !!!
Terrien’s Degeneration
Peripheral Thinning
Neovessels Lipids Astigmatism
Bowen’s Carcinoma
RemovalCryotherapyMitomycin
Corneal Pterygoid62-Year-Old Hispanic Male
2-year-History of “Pterygion”
Progressive Visual Loss (<20/400)
Solid Mass Optical Zone
Involvement Infiltrating Abnormal
Vascularization
Corneal Pterygoid
Squamous Cell Carcinoma
Clinical Features +
Biopsy
Corneal Pterygoid
Two-Step Surgical Treatment
Extensive Mass Removal (Including Superficial Cornea + Sclera)
Cryoapplication
Conjunctivoplasty
Step 1
Post Step 1
Week 2 Week 4
Histology
Carcinoma Infiltrated Cornea
Two-Step Surgical Treatment
LARGE LK (“Small Bubble Technique”)
Step 2
Week 2
BCVA 0.8 No Recurrence
Post Step 2
Month 12
SITE OF THE LESION !!!
Central (Non-Peripheral)
Infection
DIFFERENTIAL DIAGNOSIS
CORNEAL INFECTIONS External
Inflammation Non-Peripheral
Ulceration Stromal
Infiltration (Hypopion)
SITE OF THE LESION !!!
Superior 1/3
Upper Eyelid
DIFFERENTIAL DIAGNOSIS
DERMATITIS ATOPICA
SHIELD ULCER
STEROIDS !!!
SITE OF THE LESION !!!
Inferior 1/3
Exposure/Trichiasis
DIFFERENTIAL DIAGNOSIS
EXTRAOCULAR ORIGIN Ocular Innervation Eyelids
(Trichiasis) Eyelids
(Lagophthalmos) Adnexa (Tear
Production)
LESION MORPHOLOGY!!!DIFFERENTIAL DIAGNOSIS
Crystalline Dendritic Arborescent Multiple Sites
SaltzmannDegeneration
Multiple Lesions Epithelial“Cysts” Mechanical Removal
Aspergillus fumigatusSatellite Lesions!!!
Fusarium solaniDendrites
CLINICAL CASE
Arborescent ± One Site Vessels - Non-Peripheral Inflammation ±
60-Year-Old Woman, CL Wearer
Low Virulent Bacteria, Fungi (Streptococcus, Candida, etc.)
SteroidsImmunity +/-Post-PKResistance to AB
MYTH # 3:
HSK = DENDRITES
CORNEAL INFECTIONS
FACT # 3:HSK = CAN MIMIC ANYTHING !!!
CORNEAL INFECTIONS
Interstitial Keratitis
Limbal Vasculitis
EndothelitisHypopyon
HSV KERATITISHSV KERATITIS
Direct Cytolytic Effect of HSV
Abnormal Immunologc Reaction
ANTIVIRALS
STEROIDS
HSV KERATITIS
HSV & CORNEA (EYE) Infectious Epithelial Ulcer (Dendrite) Trophic Epithelial Ulcer
(“Metaherpetic”) Stromal Keratitis (Complees Antigen-
Antibody or [T]Cell- Mediated) Uveitis and Trabeculitis
HSV EYE DISEASEInfectious Epithelial Ulcer
(Dendrite) Virus +++
SPK
Dendrites
Geographic Ulcers
Trophic Epithelial Ulcer (“Metaherpetic”)
Virus - (Sterile)
Basement Membrane Damage
Innervation Damage
HSV EYE DISEASE
HSV & Type III Reaction
Interstitial Keratitis
HSV EYE DISEASE
HSV & Type III Reaction
Wessely Ring
HSV EYE DISEASE
HSV & Type III Reaction
Limbal Vasculitis
HSV EYE DISEASE
Limbal Vasculitis Atypic
Presentation Resistant to Tx
HSV EYE DISEASE
HSV & Type IV Reaction Disciform Edema
HSV EYE DISEASE
CLINICAL CASE
Arborescent - One Site Vessels + Non-Peripheral Inflammation +
13-Year-Old Male, CL Wearer
CLINICAL CASE
Smears - Cultures - Fortified Drops -
(Ceftazidime, Vancomycin, AMikacin, Voriconazole)
DAY 1 DAY 15
CLINICAL CASEDAY 1 DAY 15
Neutrophilic Infiltration
No Microrganisms
CLINICAL CASE
Acyclovir Systemic (800 mg x 5 daily)
Acyclovir topical (2 hourly)
Prednisone Systemic (1/2 mg/Kg x 2 daily)
DAY 16
CLINICAL CASE
Month 1 Month 3 Month 6
CLINICAL CASE
“Mushroom” PK
CLINICAL CASE
VA=LP(DAY 0)
VA=1.0 (Year 2)
CLINICAL CASE
Diffuse Edema No Surgery2-Year History Peripheral Vessels Inflammation ±
90-Year-Old Man, BK (Fuchs???)
CLINICAL CASE
Other Eye Normal
Endothelium !!!
90-Year-Old Man, BK (Fuchs???)
CLINICAL CASE
Treat HSV!!!Systemic & Topical
ANTIVIRALSSystemic (Topical)
STEROIDS
90-Year-Old Man, BK (Fuchs???)
DAY 0 Month 6
HSV ENDOTHELITIS
VA=HM(DAY 0) VA=0.3(s/p Phaco)
HSV ENDOTHELITIS
Medical Therapy
ANTIVIRAL Acyclovir topical (ointment) Gancyclovir topical (gel) Systemic Therapy?
(deep involvement)
HSV EYE DISEASE
Medical Therapy
ANTIINFLAMMATORY Steroids topical (IOP!!!) Steroids systemic Antiviral Coverage (topical
e/o systemic)
HSV EYE DISEASE
Vaccine Prophyilaxis Treatment of Recurrences
J.S. Pepose et al. Am. J. Ophthalmology 2006
HSV EYE DISEASE
Herpetic VaccineProphylaxis
Protection against NS Infection Antibody- and Cell- Mediated
Immunity Viral Adhesion, Lysis of
Infected Cell, Citokines
J.S. Pepose et al. Am. J. Ophthalmology 2006
Therapy Stimulate Immune Response Reduce “Shedding” Immune-Mediated HSV
Disease !!! (Uveitis, Stromal Keratitis, ecc.)
J.S. Pepose et al. Am. J. Ophthalmology 2006
Herpetic Vaccine
HSV & Conventional PK
Medium-Term Success ± 60%
Frequent Recurrences
HSV EYE DISEASE
HSV Recurrence in PK: Epithelial Defect
Often Not Dendrite
!!!L. Remeijer et al. Ophthalmology 1997
HSV EYE DISEASE
Prophylaxis of HSV Recurrences
Acyclovir 400 mg. bid p.o.
Acyclovir oint. qd ?!
J. Van Rooij et al. Ophthalmology 2003
HSV EYE DISEASE
PK SURGERY
SMALL Grafts
LOWER
Rejection Rate
HIGHER Refractive Error
LARGE Grafts
HIGHER
Rejection Rate
LOWER Refractive Error
“MUSHROOM” PK
ANTERIOR LK = “HAT”(thickness = 250 m; diameter = 9-9.5 mm)
POSTERIOR LK = “STEM”
(thickness = 300 m; diameter = 5-6 mm)
HSV & “Mushroom” PK Minimal Endothelial
Transplantation Reduced Postoperative
Refractive Errore(Anterior Diameter 9 mm !!!)
HSV EYE DISEASE
Adenoviral InfectionAdenovirus: DNA-Virus (Cell
Nucleus) Icosahedral Capside >40 Serotypes
(Capsomere Ag)
VIRIONS
CELL NUCLEUS
Epidemiology:Almost All Serotypes Associated with Ocular DiseaseSerotypes 1,2,4,5 e 6 Light SymptomsSerotypes 3,7,8,10,19 e 30 Severe Symptoms
Adenoviral Infection
Transmission:Direct ContactWater (Pool)SexualOphthalmic Examination !!!
The Virus Can Survive on Non-Porous Surfaces, i.e. Tonometer, up to 34 Days !!!
Adenoviral Infection
Clinical Entities Epidemic Keratoconjunctivitis
(Serotypes 8 e 19) Pharyngeal Conjunctival Fever (Serotypes 3 e 7)
Adenoviral Infection
Epidemic Keratoconjunctivitis
Conjunctivitis Keratitis Lid ChemosisPreauricular Swelling (Lymph Node)No Systemic Symptoms
Findings:
Ocular Findings: External Inflammation Usually Bilateral (non simultaneous) 2nd Eye Less Severly
Affected
Epidemic Keratoconjunctivitis
Conjunctivitis: Follicular Pseudomembranous Haemorrhagic
Epidemic Keratoconjuntivitis
Follicules
Pseudomembrane
Keratitis:
SPK Focal Epithelial Keratitis Active Viral Infection
Epidemic Keratoconjuntivitis
Subepithelial Infiltrates: Lymphocytic Spontaneous Resolution May Persist Very Long
(up to 10 Years !!!) Immunologic Response
to Viral Ag
Epidemic Keratoconjuntivitis
Clinical Course of Corneal Lesions
CLINICAL CASE
Previous Adenoviral Infection
Recurrent Pain and Redness
Scattered Superficial Infiltrates
Responsive to Steroids
42-Year-Old Male
CLINICAL CASE
Thygeson KeratitisCLSteroids Tapered off
Very Slowly
42-Year-Old Male
Treatment (Initial): Prevention !!! Antiviral Efficacy ??? Antibiotics Unnecessary Palliative Care
(Hot Compresses, Cycloplegics, ecc.)
Epidemic Keratoconjunctivitis
Steroids Are Only Symptomatic !!! Only for Very Severe
Symptoms !!! Addiction & Rebound Side Effects
Epidemic Keratoconjunctivitis
Treatment (Late):
CORNEAL INFECTIONS External
Inflammation Ulcer Stromal
Infiltration Hypopion
SYSTEMATIC APPROACH TO CORNEAL INFECTIONS
Establish Diagnosis (D.D. with Other Corneal Lesions)
Identify Pathogen Select Proper
Treatment
Corneal Smears & Coltures (Confocal Micr.)
Multi-antibiotic Therapy (wide spectrum)
Corneal Biopsy Surgery (Conjunctival
flap, PK “a chaud”)
SYSTEMATIC APPROACH TO CORNEAL INFECTIONS
MYTH # 4:GIVE SYSTEMIC ANTIBIOTICS
CORNEAL INFECTIONS
Hypopyon Is Sterile in Corneal Infections, Unless the Ulcer Perforates
FACT # 4:
EFFECTIVE ROUTE
CORNEAL INFECTIONS
Topical Eyedrops every 1hSubconj.
SystemicInfiltration
+/-
NO???
Mono- vs Polyantibiotic
Topical Therapy
SYSTEMATIC APPROACH TO CORNEAL INFECTIONS
Aminoglycosides (vs gyrase inhibitors)Cephalosporines (cephtazidime vs
cephazoline)Vancomycin (Meth. Res. Staphylococcus)Anphothericine B (Fungi !)
Polyantibiotic Topical Therapy :
SYSTEMATIC APPROACH TO CORNEAL INFECTIONS
Stefani, Meditime 2007
CORNEAL PHARMACOKINETICS OF NETILMICIN
Concentration after Single Administration
in vivo animal
model
Sensitivity and Resistance of 146 Gram- strains
Vanzzini V et al, Rev Mex Oftalmol 83(1): 1-5, 2009
NETILMICIN - Sensitivity Spectrum
0 20 40 60 80 100
Acinetobacter
Citrobacter
EnterobacterE. Coli
Klebsiella
P. mirabilis
P.morgani/P. vulgaris
Providencia
Pseudomonas
Salmonella
Serratia
staphylococcus
14.3 %
100 %
94.6 %80.6 %
87.2 %
63.2 %
21.8 %
2.2 %
46.3 %
8.3 %
44.4 %
91.5 %
Cumulative % susceptible
Activity against 907 AG-Resistant Strains
Muller et al, Chemotherapy, 1981
NETILMICIN – Low Incidence of Resistance
**
**
***
0.08 0.16 0.3 0.6 1.25 2.5 5.0
Concentration (mg/ml)
0
30
60
90
120
MTT
(% o
f con
trollo
)
Ofloxacina
Netilmicina
Papa et al, JOP&T 19(6): 535-545, 2003
Human Corneal
Epithelium (HCE)
*p<0.01, **p<0.001 (two way-ANOVA)
in vitro Corneal ToxicityEffect of Increasing AB Concentration on Vitality
NETILMICIN - Safety
Commercially Available Concentration(3.0 mg/ml)
0.3% Ofloxacina – 8 h0.3% Netilmicina – 72 h
Scuderi et al, Cornea 22(5): 468-472, 2003
Rabbit Corneal Epithelium (SIRC)
NETILMICIN - Safety
in vitro Corneal ToxicityEffect of Increasing AB Concentration on Cell Morphology
Clinical Evaluation
Initial Therapy
BETTER WORSE
SYSTEMATIC APPROACH TO CORNEAL INFECTIONS
BETTER
PathogenNot Identified
PathogenIdentified
Continue Therapy Add Therapy
SYSTEMATIC APPROACH TO CORNEAL INFECTIONS
HYPOPYON ↓↓↓BETTER
Day 0 Day 3
BETTERINFILTRATE ↓↓↓
Day 0 Day 7
BETTEREPITHELIUM ↑↑↑
Day 3 Day 7
Worse
Pathogen Does Not Respond to TX
PathogenNot Identified
Change Therapy Change Approach
SYSTEMATIC APPROACH TO CORNEAL INFECTIONS
Confocal MicroscopySectional Images of Corneal Structures
Epithelium Basal Epi. Nerves
AnteriorStroma Endothel.
MiddleStroma
DIAGNOSIS (INFECTION/INFESTATION) EVALUATION OF CLINICAL COURSE EVALUATION OF STROMA
Keratocyte Density Structure of sub-epithelial nerve plexus Monitoring of haze
Confocal Microscopy
Confocal Microscopy
18 µm
DAY 1
AMOEBIC KERATITIS
AMOEBIC KERATITIS
18 µm
DAY 14
2-Year-History of Transient Corneal Edema Disappears with Topical Steroids VA = 20/20
CONFOCAL MICROSCOPY (43µm)
AMOEBIC KERATITIS
DAY 1 DAY 20
AMOEBIC KERATITIS
DAY 1 DAY 20
CULTURESAgar, Sabouraud, thioglycolate, E. Coli
Acanthamoeba
PHMB (Biguanide) SIFIHexamidine
MICROSPORYDIUM KER.
338 µm
AFTER SALK
1 Day 20 Days ???VAcc = 20/50 !!!VAcc = 20/50 !!!
THx• Topical:‣Fumagillin
(Galenical) • Systemic:
Albendazole (Antihelmintic)
• Test HIV: -
30 Days
FINAL RESULT
BCVA=CFBCVA=CF BCVA=20/60BCVA=20/60
18 Months
65-Year-Old White Female
Immunesuppression, Diabetes
No CL Wear or HSV History
BSCVA ↓ ↓ ↓ 1/20
“COLD” ULCER
VancomycinCeftazidimeAmikacinVoriconazole
Day 4 after Tx“COLD” ULCER
q 2 h
CORNEAL BIOPSY
Repeat Culture + BiopsyCandida
Voriconazole+
FLUCONAZOLEq 2h
Adjusted Tx: Day 1
Adjusted Tx: Week 2
Adjusted Tx: Week 2
CORNEAL BIOPSY
Tissue Gram, Giemsa, PAS, other
Acanthamoeba
61-Year-Old White Female
PBK No Response to
Multiantibiotic/Antifungal
Treatment
“Tx Resistant” ULCER
CONJUNCTIVAL FLAP
PK after Conjunctival
Flap
s/p Conjunctival
Flap
Corneal“Patch”+
ConjunctivalFlap
Perforated Corneal
Ulcer(Sterile)
CORNEAL PATCH
PK “a Chaud”
(1 week)
Perforated Corneal Ulcer
(Staphylococcus Aureus)
PK “a Chaud” (4 weeks)
PK “a Chaud” (2 weeks)
Re-PK (1 year)
PK “a Chaud” (4 months)
MYTH # 5:ALWAYS STOP STEROIDS
EPITHELIAL DEFECT
FACT # 5:DIFFERENT MECHANISMS !!!
Mechanical Friction “Dry Eye” Condition Drug Toxicity Exposure Neurotrophic Damage
EPITHELIAL DEFECT
No Scientific Evidence of Steroidal Detrimental Effect on
Epithelial Growth !!!
EPITHELIAL DEFECT
Ointment
CL + Ointment
(Eye Patch)
Botox (Tarsorrhaphy)
EPITHELIAL DEFECT
EPITHELIAL DEFECT
EPITHELIAL DEFECT Autoserum (Physical/Chemical?)
Amniotic Membrane (never for Infection!)
BREAK !!!
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