Preauricular Pits
Write short note on Preauricular sinus. It is a congenital entity occurring due to imperfect fusion of the six tubercles which form ear cartilage.
Answer.
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Clinical Features Of Preauricular Sinus
- It is seen since childhood.
- It can be unilateral or bilateral.
- Often swelling appears and apparently disappears repeatedly.
- Pain and discharge is common.
- It causes a cosmetic problem in young individual.
- Sinus opening may be seen at the root of the helix or on the tragus.
- Track is quiet deep running backwards, slightly upwards towards the helix. It usually ends blindly.
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- Outer opening of the sinus often closed causing formation of a cystic swelling which contains flid which is often infected.
- Preauricular sinus in no instance will communicate with the external auditory meatus.
- Bursting of this swelling leads into formation of ulcer like lesion.
- Occasionally, multiple sinuses are seen.
- Opening of the sinus occurs in a small triangular area in front of the ear at the level of the tragus.
- Scarring is common around the opening due to repeated infection.
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Investigations Of Preauricular Sinus
- Discharge study should be done.
- Sinusogram is done to assess the track.
- MR sinusogram is benefiial.
Differential Diagnosis Of Preauricular Sinus
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- Cold abscess
- Sebaceous cyst
Treatment Of Preauricular Sinus
- If sinus infected antibiotics and drainage are required followed by excision when infection passes off
- Under general anesthesia complete excision of tract is only recommended.
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