Severe outcome of idiopathic inflammatory mass lesions primarily located in the posterior orbit and orbital apex. Issue 5 (29th October 2020) - Laban, Kamil G.; Kalmann, Rachel; Leguit, Roos J.; Uijttewaal, Peter H.; Radstake, Timothy R.D.J.; de Boer, Joke H.; van der Veen, Rob L.P.