Preseptal or orbital cellulitis in children is most often associated with what organisms?
Gram positive cocci
Which stain is used to see mucormycosis
Gomori methenamine silver (GMS)
How does uveal melanoma metastasize? What is the most common location of metastasis?
Extends via the vortex veins
Most common site of metastasis is liver
Which part of the ciliary body makes aqueous?
Non-pigmented ciliary body epithelium
What is the size of the foveal avascular zone?
Extension to 1000 um is pathologic and is suggestive of macular ischemia
What type of collagen is Bowman's layer and stroma?
Type I collagen
With what layer of ciliary body is RPE contiguous?
The pigmented ciliary body epithelium is contiguous with the RPE
The non-pigmented ciliary body epithelium is contiguous with the neurosensory retina.
What type of collagen is the vitreous?
Type II collagen but will still stain with PAS because of presence of mucopolysaccharides
What stain is used to see fungus?
GMS or Gomeri Methenamine Silver
How can you identify Touton giant cells as compared to Langerhans giant cells?
Touton giant cells are surrounded by lipid that stains with oil red o stain. When you see Touton giant cells think about juvenile xanthogranuloma.
What is the inheritance pattern of VHL? What chromosome is the defect on?
AD, chromosome 3