The differential diagnosis of retinoblastoma would include all except.

Written By Unknown on Friday, 11 November 2011 | 00:54

The differential diagnosis of retinoblastoma would include all except.

1. Persistent hyperplastic primary vitreous 


2. Coat's disease. 


3 Retinal astro cytoma 


4. Retinal detachment 


Ans 4                    

                                     [ref CPDT page 813 ed 15th] . "leucoria is the most common sign(60%) in retinoblastoma, D/d of leucoria includes Toxocara canis granuloma, astrocytic hamartoma, retinopathy of prematurity, coats disease, retinopathy of prematurity, persistant hyperplastic primary vitreous."
Also rarely in 7 % patients painful red eye with glaucoma, hyphema, or proptosis is the initial manifestation.
Imp about retinoblastoma : Biopsy not needed for diagnosis: characterstic features on ophthalmologic examination are intraocular calcification and vitreous seeding. Retinoblastoma can undergo spontaneous remission (Q) Also read question in past papers on aippg.com about treatment of retinoblastoma.

Reference # 2 kanski 5th ed.page 339 and 340 table 

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