Anosmia / Smell Dysfunction - Differential Diagnosis Algorithm

Nasal Obstruction/ URTI:

 • Septal Deviation

 • Allergic Rhinitis

 • Bacterial/ Viral Infection (Influenza)

Trauma:

 • Foreign Body

 • Nasal Surgery

 • Base of Skull Fracture

 • Nasal Fracture

Endocrine / Metabolic:

 • Alcoholism

 • Diabetes Mellitus

 • Adrenal Hypofunction

 • Adrenal Hyperfunction

 • Vitamin B12 Deficiency

 • Zinc Deficiency

 • Malnutrition

Neoplastic:

 • Nasal Polyps

 • Juvenile Nasopharyngeal Angiofibroma

Toxins and other Factors

 • Smoking

 • Drugs

 • Radiation

 • Toxin Exposure



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