<prompt> Bilateral proptosis in children is the most common presentation of:NeurofibromatosisLeukemiaCavernous hemangiomaMalignant fibrous Histiocytoma  <response>: Ans. b. Leukemi Leukemic infiltration into the orbit chloroma is the most common cause of bilateral proptosis in children amongst the option provided. The most common cause of bilateral proptosis in children is not definitively established, but metastatic neuroblastoma andor leukemia chloroma should be considered The Massachussets Eye and ear Infirmary review manual for Ophthalmology 3e p159, 186 Causes of Bilateral Proptosis LymphomasQ LeukemiaQ Secondaries from: NeuroblastomaQ NephroblastomaQ Ewings sarcomaQ MC cause of unilateral proptosis in children Orbital cellulitis MC cause of non-inflammatory unilateralproptosis in children Dermoid cystdeg MC cause of bilateral proptosis in children Not definitively established . Metastatic neuroblastomadeg andor leukemiadeg chloroma MC cause of unilateral proptosis in adults Thyroid ophthalmopathydeg MC cause of bilateral proptosis in adults Thyroid ophthalmopathy Bailey and Johnson Head and Neck Surgery 41513 MC benign orbital tumor in adults Cavernous Hemangioma MC malignant orbital tumor in adults Lymphomadeg MC benign orbital tumor in children Dermoid cystdeg MC malignant orbital tumor in children Rhabdomyosarcomaa 