CT and MRI findings of olfactory neuroblastoma

Objective: To summary the CT and MRI imaging findings of olfactory neuroblastoma. Methods: Sixteen cases of olfactory neuroblastoma proved by surgery and pathology were collected. The radiological findings of CT and MRI were retrospectively analyzed. Results: Three lesions were postoperative recurrence. Three lesions located in the nose, the other 13 were located the middle-back part of the nose, infiltrating the sinuses such as maxillary and ethmoid sinus. Five lesions eroded the skull base and infiltrated into the brain. Another 5 lesions infiltrated the orbit. Calcification and ossification were present in 3 cases. The density or signal intensity of the masses was heterogeneous with marked enhancement after contrast administration. Conclusion: Olfactory neuroblastoma often located in the middle-back of the nose, with malignant signs of infiltrating the sinuses, orbit, and brain, and with obvious enhancement. (authors)