True regarding "Preauricular sinus" is:
Failure of fusion of 1" and 2nd arch leads to the formation of preauricular sinus. It is commonly seen at the root of helix It is a blind track lined by squamous epithelium It may get repeatedly infected causing purulent discharge Abscess may also form Treatment is surgical excision of the track if the sinus gets repeatedly infected.
Improper fusion of auricular tubercles
Persistent opening of first branchial arch
Autosomal recessive pattern
All