Bilateral sudden onset proptosis in child: AML

Orbital infiltration with bilateral proptosis has been observed in 2% cases of acute or chronic lymphatic leukaemia [1,2]. In contrast myelogenous leukaemia only very rarely gives rise to extra ocular muscle infiltration [2]. We report an unusual case of acute myelocytic leukaemia in 10-year-old male child presenting with acute bilateral proptosis as its sole manifestation to an ENT surgeon and also describe characteristic radiological features.