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Nasal vestibule

The nasal vestibule is the most anterior part of the nasal cavity, extending from the external nares to the limen nasi. It is lined with skin, vibrissae (nose hairs), and sebaceous glands, serving as the first barrier against inhaled particles. Understanding its anatomy, function, and imaging characteristics is important for radiologists, ENT specialists, and surgeons, particularly when evaluating trauma, congenital anomalies, infections, or neoplasms.

Synonyms

  • Anterior nasal cavity

  • Vestibular portion of the nose

  • Nasal inlet

  • Entrance to nasal cavity

Function

  • Acts as a first-line filter, trapping dust, debris, and pathogens with nasal hairs

  • Participates in airflow regulation and protection of the deeper nasal cavity

  • Houses sebaceous glands that maintain skin and mucosal moisture

  • Contributes minimally to olfaction, which primarily occurs in the superior nasal cavity

MRI Appearance

T1-weighted images:

  • The nasal vestibule appears as an air-filled cavity (signal void, black)

  • Lined by thin soft tissue (skin, mucosa), which has intermediate signal intensity

  • Surrounding subcutaneous fat is hyperintense, creating natural contrast with the vestibular walls

  • Pathology such as polyps, tumors, or inflammation appears hypo- to isointense, enhancing with contrast

T2-weighted images:

  • Air remains signal void (black), sharply outlining the vestibule

  • Mucosa and soft tissue edema appear hyperintense, highlighting inflammatory or neoplastic changes

  • Adjacent subcutaneous fat remains bright, providing anatomical context

STIR (Short Tau Inversion Recovery):

  • Fat suppression removes high signal from surrounding tissue

  • Air remains a signal void, while inflamed mucosa or tumors appear bright hyperintense, improving lesion detection

  • Particularly useful for subtle inflammatory changes or small soft tissue masses

CT Appearance

  • The nasal vestibule is air-filled (hypodense, black), making it easily identifiable

  • Vestibular walls (skin, subcutaneous tissue) are soft tissue density

  • Surrounding cartilage (alar and septal cartilage) appears intermediate density, while any calcification or ossification appears hyperdense

  • CT effectively demonstrates obstructions, foreign bodies, trauma, or congenital anomalies

  • Helps assess vestibular airway patency and adjacent bony structures

MRI images

Nasal vestibule mri axial image -img-00000-00000

MRI images

Nasal vestibule mri sag image -img-00000-00000

MRI image

Nasal vestibule coronal