Ethmoiditis-associated apex syndrome may result in temporary blindness after allo-SCT.

The article presents a case report of a 64-year old woman who had renal cell carcinoma and then suffered ethmoiditis. During admission, she was subjected to allogeneic haematopoietic stem cell transplantation (HSCT) to foster graft versus tumor effect. Tacrolimus and sirolimus were some of the medications being administered during recovery. However, the patient posed complaints on frontal headache at the area of the right eye and nausea which later further impaired vision of the right eye.