Magnetic resonance imaging (MRI) is commonly ordered in the workup of the anosmic patient. Anosmia is associated with relatively reduced olfactory bulb and tract (OBT) volumes on MRI in a variety of clinical settings, but congenitally anosmic patients will characteristically have olfactory nerve aplasia or hypoplasia. We present the case of an otherwise healthy 9-year-old male who presented to the Ear, Nose, and Throat clinic for evaluation of longstanding anosmia. On exam, the patient was a well-developed, healthy-appearing male, who was unable to smell an alcohol pad. Physical exam and endoscopic examination were unremarkable. An MRI Brain with and without contrast was ordered, demonstrating left OBT hypoplasia and right OBT aplasia, and these findings are discussed.
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