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Common childhood ophthalmic malignancy - Dr Elias
1. Common childhood ophthalmic malignancy
Elias T - R-II
JUDO, June 2021
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2. Out lines
ā¢ Introduction
ā¢ Retinoblastoma
ā¢ Rhabdomyosarcoma
ā¢ Neuroblastoma
ā¢ Capillary hemangioma
ā¢ Others to discus
ā¢ References
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3. Introduction
ļSeveral benign and malignant ocular tumors can occur in childhood
ļTumors in the ocular region can lead to loss of vision, loss of the eye
ļIn the case of malignant neoplasms - loss of life
ļIt is important to recognize childhood ocular tumors early
ļTo have diagnostic studies done and manage appropriately
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4. 7/3/2021 common childhood tumors - elias 4
āIf most solid tumors of childhood
are indeed correctly
attributable to mutations in germ
and/or somatic cells ā¦
then childhood cancer cannot be
prevented. ā¦ the main
effort against childhood cancer
must be that of early
diagnosis and treatmentā
A. G. Knudson Jr, 1976
5. Retinoblastoma
ā¢ The most common primary intraocular malignancy in childhood.
ā¢ Accounts for about 3% of all childhood cancers
ā¢ Incidence: 1 in 14, 000 to 1 in 20, 000 live births.
ā¢ Bilateral in 30-40% of cases.
ā¢ 40% of the case is heritable.
ā¢ No gender or racial variation
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6. Cont.ā¦
ā¢ Occurs equally in right and left eyes
ā¢ 90% occurs before 3 years.
ā¢ Eighth most common childhood cancer
ā¢ Mean age at diagnosis depends on family history and the laterality
ā patients with a known family history of retinoblastoma: 8 months
ā patients with bilateral disease: 12 months
ā patients with unilateral disease: 24 months
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7. Genetic Counseling
ā¢ Mutation in the RB1 located on the long arm of chromosome 13 at locus 14
(13q14).
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8. Cont.ā¦
ā¢ Protein (pRB) that binds various cellular proteins to suppress cell
growth
ā¢ RB1 is a recessive oncogene at cellular level
ā¢ Mutations of RB1 alleles result in cancer only in developing retina; other
cell types die by apoptosis in absence of RB1
ā¢ Primitive retinal cells disappear within first few years of life so RB is
seldom seen after 3 or 4 years of age
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9. Pathogenesis of RB
ā¢ Arises from undifferentiated retinoblasts of inner layer of optic cup
ā¢ Before its differentiation to PHR
ā¢ Immunohistochemistry - neuron-specific enolase, ROS specific S-
antigen & rhodopsin. IPRrBP ā Secreted by tumor cell
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10. Hereditary
ā¢ One of Knudsonās 2 hits occur prior to conception
ā¢ 40% of RB is hereditary type of RB
ā¢ The risk of the Knudsonās second hit/new mutation is extremely
high (therefore RB is inherited as AD trait with 90% penetrance)
ā¢ There is risk of bilateral RB (as all cells have inherited one mutant
allele)
ā¢ There is risk of non-ocular malignancies elsewhere (as all cells
have one mutant allele)
ā¢ Age of presentation: 12 months
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11. Non-hereditary
ā¢ Both of Knudsonās 2 hits occur after conception
ā¢ Both alleles are normal after fertilization, but two or more
subsequent spontaneous mutations inactivate both alleles
ā¢ 60% of RB is nonhereditary type of RB
ā¢ No risk of bilateral RB
ā¢ No risk of non-ocular malignancies elsewhere
ā¢ Age of presentation: 24 months
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21. Evaluation
ā¢ Complete physical examination
ā¢ EUA
ā¢ The intraocular pressure and corneal diameter of both eyes should
be measured
ā¢ The location of all tumors in each eye should be clearly documented
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22. Cont.ā¦
ā¢ A funduscopic examination is performed with indirect
ophthalmoscopy and gentle scleral depression to the ora serrata.
ā¢ Small retinoblastoma lesions may appear as translucent flat or
dome shaped lesions
ā¢ As the tumors increase in size, they often take on a white or
off-white, chalky color
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23. Morphologic feature
ā¢ Early retinoblastoma is a solitary or multifocal, well-circumscribed,
translucent intraretinal mass
ā¢ As the disease advances,
ā¢ Tumor becomes more pink in color,
ā¢ With dilated feeding blood vessels,
ā¢ Exhibit one of three main growth patterns
ā¢ Exophytic ,endophytic and diffuse infiltrating retinoblastoma
ā¢ Trilateral retinoblastoma??
ā¢ SPONTANEOUSLY ARRESTED®RESSED TUMORS and RETINOCYTOMA??
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25. Histopathology
ļ Composed of small basophilic cells (Retinoblasts) with large hyperchromatic
nuclei and scanty cytoplasm
ļ Many retinoblastomas are undifferentiated but varying degrees of differentiation
are characterized by the formation of rosettes
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30. Treatment
ā¢ Aims of management
ā¢ First goal to save life
ā¢ Second goal to save eye
ā¢ Third goal to maximize vision
ā¢ Oncologists, pediatric ophthalmologists, geneticists, genetic
counselors, pediatric oncologists, and radiation oncologists
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32. Enucleation
ā¢ The tumor involves more than 50% of the globe
ā¢ Orbital or optic nerve involvement is suspected
ā¢ Anterior segment involvement is present
ā¢ Neovascular glaucoma is present
ā¢ The affected eye has limited vision potential
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33. Laser Therapy
ā¢ Argon 532um
ā¢ Power 250-300mw and duration 300-500ms.
Cryotherapy
ā¢ Destruction of the cellular membranes during freeze-thaw cycle
ā¢ Vaso-occulsion
ā¢ Laser is chosen for posterior tumors, cryoablation for more anterior
tumors.
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34. External Beam Radiotherapy
ā¢ In the mid-1900s, EBRT became the main alternative to enucleation for
salvaging eyes with RB
ā¢ EBRT is associated with second cancers, mainly in the field of
irradiation and with facial cosmetic problems
ā¢ In recent years, there has been a trend toward avoiding both
enucleation and EBRT when possible
ā¢ Because RB tumors are responsive to radiation, EBRT has become a
salvage technique, when chemotherapy has failed
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35. Chemo treatment from INCTR-03-05 RB protocol
ā¢ Based on PE, diagnostic work-up, consider the following scenarios:
ā Intraocular disease without buphthalmos
ā Intraocular disease with buphthalmos
ā Extraocular/orbital disease
ā Extraorbital (metastatic) disease
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36. .
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ā¢ Intraocular Disease without Buphthalmos
ā Upfront enucleation ā removing 0.8 to 1 cm of ON
ā Review of pathology
ā Risk factors: involvement of choroid (massive), sclera
or episcleral vessels, optic nerve beyond lamina
cribrosa, anterior chamber/ciliary body
ā If NO risk histology ā no additional therapy
ā If YES risk histology ā adjuvant chemotherapy
ā¢ 3 courses of VCE and 3 courses (VCyD)
or
ā¢ 6 courses of VCyD if carboplatinum and etoposide are not
available.
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37. ā
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ā¢ Intraocular Disease with Buphthalmos
ā Delay enucleation to avoid rupture and suboptimal optic
nerve resection
ā Preoperative chemotherapy:
ā¢ 2 courses of VCE or
ā¢ 2 courses of VCyD if VCE not available
ā Enucleation
ā Postoperative chemotherapy
ā¢ To complete a total of 6 courses ;3 courses of VCE and 3
courses of VCR/CYC/DOX (VCyD) or
ā¢ 6 courses of VCyD if carboplatinum and etoposide are not
available
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38. .
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ā¢ Extraocular/Orbital Disease
ā Treatment ; chemotherapy+ enucleation+ orbital irradiation
if possible.
ā¢ Chemotherapy 4 courses VCE and 4 courses VCyD for a total of 8
cycles (4 VCE and 4 VCyD).
ā Start chemotherapy with standard regimen: give 2 or 3
courses of VCE (or VCyD if VCE not available).
ā If good response, proceed with enucleation.
ā Complete postoperative chemotherapy for a total of 8
courses.
ā¢ Consolidate with orbital Radiation Therapy (45 Gy) to orbit up to
optic chiasm if RT is available
ā¢ Extraorbital (metastatic) disease;Palliation
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Chemotherapy Regimens
ā¢ If carboplatin is available , standard regimen ;VCE(
vincristine, carboplatin&etoposide)
ā¢ If carboplatin is not available , can use VCyD( vincristine
,cyclophosphamide & doxorubicin)instead,
ā¢ Cycles can be given every 21 or 28 days
ā¢ Cotrimoxazole -5 mg /kg orally daily for 3 consecutive
days per week through entire chemotherapy protocol and
for 12 weeks after the end of therapy
ā¢ Criteria for initiation of each cycle
1. ANC > 750/mm3and recovering
2. Platelets > 75,000/mm3 and recovering
3. Normal serum creatinine for age
5. SGPT/SGOT < 2.5 times upper limit of normal
common childhood tumors - elias
40. Follow-up
ā¢ Patients with treated RB and siblings at risk need to be followed
ā¢ After initial treatment, re-examine patient 3ā6 weeks later:
ā¢ Active tumor on treatment requires follow-up every 3 weeks
ā¢ If tumor is obliterated, follow-up 6ā12 weeks later
ā¢ 3-monthly until 2 years post-treatment, then 6 monthly until 6 years of
age, then yearly for life
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41. Prognosis
ā¢ Location (most important factor):
ā¢ 95% 5-year survival if intraocular tumor
ā¢ Less than 50% 5-year survival with extraocular
extension/optic nerve involvement
ā¢ Tumor size and grade
ā¢ Iris rubeosis
ā¢ Bilateral tumors (risk of second malignancy)
ā¢ Age of patient (older is worse)
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42. Second cancer in RB patients
ā¢ Osteogenic sarcoma is the most common cancer
ā¢ Pineoblastoma, ectopic intracranial RB (trilateral RB) is common up to 2 years
after diagnosis of RB
ā¢ Beyond 2 years after diagnosis of RB
ā¢ Bony and soft tissue sarcomas (Ewingās tumor, chondrosarcoma,
rhabdomyosarcoma)
ā¢ Skin tumors (malignant melanoma, sebaceous cell CA, squamous cell CA)
ā¢ Neuroblastoma, medulloblastoma, leukemia
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43. Natural history of RB
ā¢ Intra-retinal tumor
ā¢ Angiogenesis with feeder artery and draining vein.
ā¢ Loss of cellular adhesion and begin to seed into the vitreous (endophytic)
and subretinal spaces (exophytic with RD)
ā¢ Invasion of the choroid and optic nerves and into the brain Continued
growth may induce glaucoma
ā¢ Ruptures the globe and see into the orbit or periorbital tissue.
ā¢ Distant metastasis is rare nowadays.
ā¢ Spontaneous regression in 5%
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44. Orbital Rhabdomyosarcoma
ā¢ The most common primary orbital malignant tumor in children
ā¢ Rhabdomyosarcomas arise from undifferentiated pluripotential
mesenchymal cell not from extraocular muscle
ā¢ 3.4 % of all childhood malignancies
ā¢ The average age of onset is 7-8 years, but it can occur at any age.
ā¢ No racial predisposition
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45. Cont.ā¦
ā¢ The orbit is the origin of 10% of RMS;
ā¢ 25% of these tumors arise elsewhere in the head and neck,
ā¢ 90% diagnosed before age 16 yrs
ā¢ RMS in infancy is more aggressive and carries a poorer prognosis
ā¢ Can primarily involve orbit, eyelid, conjunctiva & uveal tract
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47. Embryonal RMS
ā¢ Most common (85 %) & good prognosis.
ā¢ Elongated cell with centrally located hyperchromatic nucleus
surrounded by eosinophilic cytoplasm.
ā¢ Cross-striations are seen in 50- 60%.
ā¢ Commonly arise in superior nasal quadrants
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48. Alveolar RMS
ā¢ Least common & carries worst prognosis.
ā¢ Consists of eosinophilic rhabdomyoblasts that are loosely adherent
within thin hyalinized CT septa.
ā¢ Only 30% show cross striations.
ā¢ Usually originates within inferior orbit.
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49. Botyroid RMS
ā¢ Considered as variant of embryonal RMS
ā¢ Appears as fleshy grape-like or papillomatous mass
ā¢ It is not found in the orbit as a primary tumor
ā¢ Occurs as a secondary invader from the PNS or from the conjunctiva
ā¢ Cluster of tumor cells arranged in a loose syncytium
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50. Pleomorphic RMS
ā¢ Very rare & common in adult.
ā¢ Has best prognosis
ā¢ Cells are straplike or rounded, and cross-striations are easily
visualized with trichrome stain.
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51. Clinical feature
ā¢ Acute, rapidly progressive proptosis with an absence of pain ā typical
CF
ā¢ Proptosis (80%ā100%)
ā¢ Globe displacement (80%)
ā¢ Blepharoptosis (30%ā50%)
ā¢ Conjunctival and eyelid swelling (60%)
ā¢ Palpable mass (25%)
ā¢ Pain (10%)
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52. Work up
ā¢ US - well circumscribed, heterogenous, irregular mass with low to medium echogenicity
ā¢ CT- well circumscribed, homogenous, soft tissue mass isodense as compared to muscles calcification
ā¢ MRI - T1 weighted ā Isointense to EOM & hypointense to orbital fat
T2 weighted - Hyperintense to orbital fat & EOM
ā¢ Immunohistochemical āAb to desmin, actin,myoD1,myoglobin, vimentin
ā¢ Biopsy
ā¢ Systemic evaluation
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53. .
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Treatment
ā¢ Ultimate diagnosis of RMS requires biopsy for histopathologic
evaluation
ā¢ Treatment modalities
ā¢ surgery,
ā¢ irradiation and
ā¢ Chemotherapy
IRSG postsurgical staging system
ā¢ Group I: localized disease, completely resected (excisional biopsy)
ā¢ Group II: microscopic disease remaining after biopsy
ā¢ Group III: gross residual disease remaining after biopsy
ā¢ Group IV: distant metastasis present at onset
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ā¢ Group I ;chemotherapy only: VA (vincristine and actinomycin)
ā¢ Group II; chemotherapy(vincristine + actinomycin D) & radiotherapy
ā¢ Group III; chemotherapy (vincristine + actinomycin D
+cyclophosphamide /ifosfamide / etoposide) & radiotherapy
ā¢ Group IV - palliative care
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55. Prognosis
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ā¢ 94% and 74% ; 5-year survival for embryonal & alveolar
variants respectively
ā¢ Infants - more aggressive & survival rates of 54%
ā¢ Confined to orbit - survival rate is 90%
ā¢ Bone destruction & extension beyond orbit āsurvival rate
65%
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56. Follow up
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ā¢ Look for side effects of radiotherapy, recurrence & secondary
tumors
ā¢ MRI - at 3mo intervals, with decreasing frequency until 5
years after treatment
ā¢ Ocular examination - every 3ā4 months & after first year
every 4ā6 months for several years and then yearly
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57. Metastatic tumor
ā¢ Metastatic neoplasms to orbit
ā¢ Predominated by small, round, blue-cell tumors.
ā¢ Neuroblastoma
ā¢ Ewingās sarcoma
ā¢ Wilms tumor
ā¢ Leukemia
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58. Neuroblastoma
ā¢ Neuroblastoma is one of the most common childhood cancers
ā¢ The most frequent source of childhood orbital metastasis (89% of cases).
ā¢ Arise from primitive neural cells (neural crest cells)
ā¢ Adrenal gland or the sympathetic ganglion chain in the retroperitoneum or
mediastinum.
ā¢ 20% of all patients with neuroblastoma show clinical evidence of orbital
involvement,
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59. Contā¦
ā¢ Incidence ļ 1 per 1000 live births
ā¢ Accounts for 10% of all pediatric malignancy.
ā¢ The mean age at diagnosis - 2 years
ā¢ 90% are diagnosed by 5 years of age.
ā¢ Inherited as AD
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60. Histopathology
ā¢ Soft, friable, bluish mass; small round cells that resemble lymphocytes
ā¢ Specks of calcium and areas of necrosis are seen.
ā¢ Disproportionately large darkly staining nuclei & scanty cytoplasm.
ā¢ Electron microscopy reveals neurosecretory tubules
ā¢ In 1Ā° tumors there is differentiating neuroblasts with a rosette
formations is seen (Homer Wright rosettes).
ā¢ Once tumor metastasizes - neural differentiation lost
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61. ā¢ Immunohistochemical markers
ā¢ NB84, neuron-specific enolase (NSE), S-100, Synaptophysin &
Chromogranin.
ā¢ >90% of affected children excrete catecholamine by products.
ā¢ Homovanillic acid (HVA)
ā¢ Vanillylmandelic acid (VMA) in urine.
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63. Investigation
ā¢ UA - Homovanillic acid (HVA) and Vanillylmandelic acid (VMA)
ā¢ US
ā¢ Plain abd XR and CXR
ā¢ CT
ā¢ MRI
ā¢ CBC, RFT,LFT
ā¢ BMA and Biopsy
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65. Treatment
ā¢ Stage 1,2 & 4-S
ā Surgery alone
ā Chemotherapy indicated
ā¢ Reccurence
ā¢ Unfavorable histology
ā¢ Stage 3 & 4
ā Neoadjuvant chemotherapy
ā Followed by surgery
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66. Chemo agent
ā¢ Combination of drugs :
ā Cyclophosphamide (Cy)
ā Carboplatin(C)
ā Cisplatin
ā Vincristine (V)
ā Doxorubicin (D)
ā Etoposide(E)
ā Topotecan(T)
ā¢ Most common combination used ā (CCyDE)
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67. RT
ā¢ 1500cGy in children & 4000cGy in patients older than 10years.
ā¢ Used for localized tumor
ā¢ Shrink tumors before surgery.
ā¢ As treatment regimen (along with high-dose chemotherapy) before
a stem cell transplant.
ā¢ Relieves pain
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68. ā¢ Stage 1 - 5 year survival rate >98%
ā¢ Stage 2 & 3 - 5 year survival rate 90 to 95%
ā¢ Stage 4 - 5 year survival rate 40 to 50%
ā¢ Stage 4-S - 5 year survival rate >90%
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69. Leukemia
ā¢ Acute in 95%
ā¢ ALL>AML
ā¢ Responsible for 30% all childhood malignancy
ā¢ Most common ocular manifestation is leukemic retinopathy ( retinal hg)
ā¢ Ocular involvement highly corelate CNS involvement
ā¢ Anterior segment - HI, KPs, hyphemia, pseudo hypopyon, glaucoma
ā¢ Choroid ā¦ā¦..
ā¢ Optic nerve ā¦..
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70. References
ā¢ Pediatric Ophthalmology & Strabismus, BCSC, Section 6, 2019-2020
ā¢ Ryanās retina 6th edition (2017)
ā¢ Duane`s Ophthalmology, 2012
ā¢ Yanoff & Duker Ophthalmology, 5th ed
ā¢ J.J. Kanski. Clinical Ophthalmology, A Systematic Approach, 8th ed.
ā¢ INCTR-USA protocol for the treatment of children with
Retinoblastoma in Ethiopia
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