Fibro-inflammatory pseudotumour in the maxillary sinus

We describe a rare case of fibro-inflammatory pseudotumour in the right maxillary sinus of a 13-year-old Chinese girl who presented with proptosis and radiological appearance suspicious of malignancy but was histologically benign. She underwent Caldwel-Luc operation and received prolonged steroid therapy. She is now free of the disease both clinically and radiologically 33 months after cessation of therapy.