The most common cause of proptosis in adults:-
Most common cause of unilateral proptosis in children is orbital cellulitis and in adults is thyroid ophthalmopathy. Most common cause of bilateral proptosis in children is neuroblastoma and leukemia (chloroma) and in adults is thyroid ophthalmopathy.
Orbital cellulitis
Preseptal cellulitis
Thyroid eye disease
Capillary hemangioma
NEET 2019