Final answer:
The condition where there is narrowing of the nasal vestibule is known as nasal vestibular stenosis, which affects airflow through the nasal cavity.
Step-by-step explanation:
Dr. Smith examined Tom Thomas's nasal area and noted a narrowing of the nasal vestibule. This condition is known as nasal vestibular stenosis. Nasal vestibular stenosis is a narrowing of the nasal cavity at the opening through the skull, where air passes. This can affect breathing and requires medical attention.