Most common cause of bilateral proptosis in children-
Common cause of proptosis in children is neuroblastoma and leukemia (chloroma) and in adults is thyroid ophthalmopathy. Ref. Ak khurana 6th edition pg no 404 QUESTION REPEATED
Rhabdomyosarcoma
Neuroblastoma
Retinoblastoma
Neuroblastoma
Diseases of orbit, Lids and lacrimal apparatus