Most common cause of bilateral proptosis in children:

Ans. d. Neuroblastoma (Ref: Khurana 4/e p381; Parsons 21/e p480-485: Kanski 7/e p80-114; Yanoff's 3/e p1450-1464; 'The Massachussets Eye and ear Infirmary review manual for Ophthalmology' by juger Lamkin (Lippincott Williams) 3/e p159, 186)Most common cause of bilateral proptosis in children is Neuroblastoma.'The most common cause of bilateral proptosis in children is not definitively established, but metastatic neuroblastoma and/or leukemia (chloroma) should be considered.' - 'The Massachussets Eye and ear Infirmary review manual for Ophthalmology' 3/e p159, 186.Causes of Bilateral ProptosisLymphomasQLeukemiaQSecondaries from:NeuroblastomaQNephroblastomaQEwing's sarcomaQMC cause of unilateral proptosis in children* Orbital cellulitisQMC cause of (non-inflammatory) unilateral proptosis in children* Dermoid cystQMC cause of bilateral proptosis in children* Not definitively established* Metastatic neuroblastomaQ and/or leukemiaQ (chloroma)MC cause of unilateral proptosis in adults* Thyroid ophthalmopathyQMC cause of bilateral proptosis in adults* Thyroid ophthalmopathyQ MC benign orbital tumor in adultsCavernous HemangiomaQMC malignant orbital tumor in adultsLymphomaQMC benign orbital tumor in childrenDermoid cystQMC malignant orbital tumor in childrenRhabdomyosarcomaQ