Unilateral olfactory bulb volume loss due to arteriovenous malformation

Excerpt

Olfactory bulb (OB) volume may be affected by many diseases. Olfactory atrophy with reductions in the volume of the OB may be observed in patients with Parkinson’s disease, acute major depression, mild cognitive impairment and Alzheimer’s disease, bilateral sinonasal polyposis, normal pressure hydrocephalus and idiopathic intracranial hypertension, and total laryngectomy and those who smoke [1‐5]. Unilateral OB volume loss may be seen in fracture of the cribriform plate, tumors, metastases, granulomas and other lesions of the OBs or tracts, olfactory fossa meningioma, and vascular anomalies associated with a persistent primitive olfactory artery. Cerebral arteriovenous malformation (AVM) is a congenital vascular malformation characterized by arteriovenous shunt through a collection of tortuous vessels without an intervening capillary bed. AVM can cause steal phenomenon that results in hypoperfusion and focal atrophy in the adjacent neural parenchyma. …