Retina Flashcards
Features that suggest choroidal Nevus will evolve into melanoma
Thick (>2mm) Orange (lipofuscin) Juxtapapillary SRF Visual symptoms
Retinal capillary hemangioma associated with what?
VHL
Also cerebellar hemangioblastoma, renal cell carcinoma
What is “bunch of grapes” retinal mass? What syndrome associated?
Retinal CAVernous hemangioma
No associated syndrome
Retinal astrocytoma or astrocytic hamartoma assoc with what dz? What’s it look like?
Tuberous sclerosis or NF
1 or more yellow white masses obscuring vessels. Mulberry
Racemose hemangioma assoc w what syndrome? What other findings
Wyburn-mason syndrome
AVM midbrain
Retinal detachment: RFs that decrease reattachment rate
Worse: pseudo or aphakic
Worst: pvr, giant tear, choroidal detachment, inflammation, traumatic posterior break
Best: small tear or dialysis
Which area of retina is defined as where INL and GCL r absent?
Foveola
Which area of retina has 2 or more Ganglion cell layers?
Macula
What is definition of fovea?
Depression where photoreceptor layer has only cones
What is treatment for toxoplasmosis?
Pyrimethamine, sulfadiazine, folinic acid
Alternatives: bactrim or azithromycin
Features of terrien marginal degeneration
T- Thinning top (superior) traversing pannus over thinning Thirties Transplantation (crescent shaped lamellar) if perforation
Copper toxicity
Chalcosis Descemets deposition Green aqueous particles Brown red vitreous particles Green discoloration of iris Metallic fleck on retina surface Sunflower cataract
Siderosis
Iron deposition Haber Weiss reaction Intracellular oxidants Deposit in epithelial tissues -iris muscles, CB epith, lens epith, retina, RPE ERG- b-wave amplitude Sx: nyctalopia Brown anterior lens deposits Cataract Rust Corneal stroll scarring retinal pigment changes Narrowed retinal vessels ON pallor
