What is a Pre-Auricular Sinus Excision?

A pre-auricular sinus excision (pronounced pre-aw-RIK-yoo-lar SY-nus ex-SIZH-un) is a surgical procedure to remove a small, naturally occurring pit or tract located just in front of your ear. This pit, known as a pre-auricular sinus or cyst, is a congenital malformation, meaning it is present from birth. It often looks like a tiny hole or dimple in the skin.

Inside this pit, there is usually a narrow channel or tunnel, called a sinus tract, which can sometimes be quite complex and branched. This tract is lined with skin cells and can extend downwards, sometimes reaching the cartilage of the ear.

The purpose of the excision is to completely remove this entire sinus tract. This is important because the tract can become blocked, leading to a build-up of fluid, infection, or even the formation of an abscess (a collection of pus). By removing the whole tract, the surgery aims to prevent these problems from happening again in the future and to relieve any symptoms you might be experiencing.

Why Might I Need Pre-Auricular Sinus Excision?

You might need a pre-auricular sinus excision if the small pit in front of your ear is causing problems. While many people have these pits and never experience any issues, surgery is typically recommended when the sinus becomes symptomatic, meaning it starts to cause noticeable problems.

The main reason for needing this procedure is recurrent infections. The sinus tract can easily trap dead skin cells, oils, and bacteria, making it prone to infection. When this happens, you might experience:

Pain: The area around the pit can become tender and sore.
Swelling: The skin around the pit may become red and swollen.
Discharge: You might notice pus or a cloudy fluid draining from the pit.
Abscess formation: In some cases, a severe infection can lead to an abscess, which is a painful collection of pus under the skin.

If you are experiencing these symptoms repeatedly, or if an infection is particularly severe, your ENT (Ear, Nose, and Throat) surgeon will likely recommend surgical removal. The goal of the surgery is to prevent these future infections, alleviate your symptoms, and improve your overall comfort and health.

It's important to note that if your pre-auricular pit remains asymptomatic (meaning it doesn't cause any problems or infections), surgical removal is generally not necessary. The decision for surgery is primarily based on the presence of recurrent infections or significant symptoms.

In rare cases, pre-auricular pits can be associated with other conditions, such as unilateral hearing loss (hearing loss in one ear) or certain syndromes like branchio-oto-renal (BOR) syndrome. If your doctor suspects such an association, further assessments, including hearing screening, may be recommended.

What Happens Before Surgery?

Preparing for your pre-auricular sinus excision involves several important steps to ensure you are ready for the procedure and to minimise any risks. This process starts well before your surgery date.

Initial Consultation and Assessment

Your journey begins with a thorough evaluation by an ENT surgeon. During this consultation, the surgeon will:

Examine your pre-auricular sinus and discuss your symptoms and medical history in detail.
Explain the procedure, its benefits, and potential complications.
Answer any questions you may have.
Obtain your signed consent for the surgery. If the patient is a child, parents will consult with the ENT surgeon and anaesthetist and provide consent.

It is crucial to disclose your full medical history, including any previous surgeries, current medications (both prescription and over-the-counter), and any past reactions or complications you've had with anaesthesia.

Managing Active Infections

If your pre-auricular sinus is actively infected (showing signs of redness, swelling, pain, or discharge) at the time of your initial assessment, surgery will not be performed immediately. Operating during an active infection significantly increases the risk of complications, including recurrence of the sinus.

Instead, your doctor will first prescribe a course of antibiotics to control the infection and reduce inflammation. If an abscess (a collection of pus) has formed, it may need to be drained using a needle (needle aspiration) or a small incision (incision and drainage) before the definitive surgery can take place. The surgical excision will only be scheduled once the infection has completely settled and the area is calm.

Pre-operative Instructions

As your surgery date approaches, you will receive specific instructions:

Medications: You may be advised to stop certain medications, particularly blood thinners, for a specified period before surgery to reduce the risk of bleeding. Always follow your surgeon's and anaesthetist's advice regarding your medications.
Fasting: You will need to follow strict fasting guidelines before surgery, especially if you are having general anaesthesia. This typically means no food or drink for at least six hours prior to your procedure. For children, water may be allowed up to two hours before surgery, but specific fasting times will be confirmed by the Day Surgery Unit. It is vital to adhere to these instructions to prevent complications during anaesthesia.

On the Day of Surgery

When you arrive at the hospital on the day of your surgery:

A nurse will assess you, take your vital signs, and help you change into a hospital gown.
An intravenous (IV) drip might be started in your arm to administer fluids and medications.
For children, a freezing cream might be applied to the skin where the IV will be inserted to minimise discomfort.
The anaesthetist will meet with you (or your parents, if you are a child) to discuss the anaesthetic plan and answer any last-minute questions.
The surgeon may mark the area around the sinus with a special pen to guide the incision.
In some cases, hair near the ear may need to be shaved to ensure a clean surgical field.

What Happens During Surgery?

The pre-auricular sinus excision is a precise surgical procedure designed to remove the entire sinus tract. Here’s a step-by-step overview of what typically happens:

Anaesthesia

The procedure is most commonly performed under general anaesthesia, which means you will be completely asleep and will not feel any pain during the operation. In some specific cases, local anaesthesia (where only the area around the ear is numbed) might be used, but this is less common for complete sinus removal. Your anaesthetist will discuss the best option for you or your child.

The Surgical Procedure

Once the anaesthesia has taken effect, the surgeon will begin the operation. The procedure typically lasts between 30 minutes and 1.5 hours, depending on the complexity of the sinus tract.

Incision: The surgeon will make a small incision (cut) in the skin just in front of your ear. This incision is usually elliptical, meaning it's shaped like an oval, and it carefully encompasses the opening of the sinus pit and any existing scar tissue from previous infections.
Dissection and Removal: The most crucial part of the surgery is the careful dissection (separation of tissues) to identify and remove the entire sinus tract. This tract can be delicate and sometimes branched, extending deep into the tissues, often down to the cartilage of the ear. The surgeon will meticulously remove all the soft tissue associated with the tract.
Ensuring Complete Removal: To help ensure that the entire tract is removed, the surgeon may use a fine probe to trace its length and depth. In some cases, a special blue dye called methylene blue might be injected into the sinus opening. This dye helps to highlight the full extent of the tract, making it easier for the surgeon to see and remove it completely. For very complex cases, a slightly different approach, sometimes called a supra-auricular approach (meaning above the ear), might be used to gain better access.
Local Anaesthetic: Before closing the wound, the surgeon may administer a local anaesthetic to the area. This helps to numb the site, providing pain relief for several hours after you wake up from the general anaesthesia.
Closure: Once the entire sinus tract has been removed, the wound will be closed with stitches. These stitches are often absorbable, meaning they will dissolve naturally over time and won't need to be removed. They are typically placed beneath the skin to minimise scarring. Adhesive bandage strips (Steri-Strips) or a special tissue glue may also be applied over the incision to provide a waterproof dressing and support the wound as it heals. In some cases, a soft head bandage might be applied to protect the area.

What Happens After Surgery?

Your recovery begins immediately after the surgery. Here’s what you can expect:

Immediately After Surgery (Recovery Room)

When you wake up from the anaesthesia, you will be in the recovery room. It's normal to feel a bit groggy, tired, or even experience some nausea or vomiting from the anaesthesia. You might also have a sore throat if a breathing tube was used during surgery. The nursing staff will monitor your vital signs closely and provide pain relief medication to manage any discomfort around the surgical site. You can expect some mild discomfort and swelling in the area for several weeks.

On the Ward and Discharge

Once you are fully awake and stable, you will be moved to a ward. Most patients, especially children, are able to go home on the same day as the surgery. Before discharge, the nursing staff will ensure your pain is well-controlled and that you understand your post-operative instructions. For children, paracetamol (acetaminophen) is often recommended for pain relief during the first 24 hours.

First Few Days and Weeks at Home

Your recovery at home is crucial for proper healing:

Wound Care:
- Keep the surgical site clean and dry.
- If adhesive bandage strips were applied, your surgeon will advise when these should be removed, usually at your follow-up appointment.
- If tissue glue was used, it acts as a waterproof dressing and will naturally detach after about two weeks. You won't need to change dressings or apply special creams.
- If non-dissolvable stitches were used, they will typically be removed within a week at your doctor's office or during your follow-up appointment.
Bathing and Showering:
- If your wound is covered with tissue glue or a waterproof dressing, showering is generally safe.
- If not, you may be advised to avoid bathing or showering until after your follow-up appointment with the surgeon, usually about one week after the procedure, to ensure the wound stays dry.
Pain Management: Continue to take pain relief medication as prescribed or recommended by your doctor. Mild discomfort is normal, but it should gradually improve.
Activity Restrictions:
- Avoid strenuous activities, heavy lifting, contact sports, and swimming for a period recommended by your surgeon, typically for one to two days initially, but sometimes longer for more vigorous activities.
- Children can usually return to school or daycare when they feel comfortable, often within a day or two.
Scar Management: Once the wound has fully healed and the stitches or glue have gone, you might consider scar management techniques. Gentle massage of the scar or the use of silicone gels can sometimes help to improve the appearance of the scar over time.

Long-Term Recovery and Follow-Up

You will have a follow-up appointment with your surgeon. This is usually scheduled about one week after the procedure, or sometimes four to six weeks post-surgery. This appointment allows the surgeon to check your healing progress, remove any non-dissolvable stitches if necessary, and discuss any concerns you may have.

While the initial swelling and discomfort subside within a few weeks, the area will continue to heal internally for several months. The aim is a complete recovery with no further infections.

What are the Potential Risks and Complications?

Like any surgical procedure, pre-auricular sinus excision carries some potential risks and complications. Your surgical team will take every precaution to minimise these, but it's important to be aware of them.

General Surgical and Anaesthesia Risks

Reactions to Anaesthesia: While rare, some people can have adverse reactions to general anaesthesia, such as nausea, vomiting, or more serious allergic reactions. Your anaesthetist will discuss these risks with you.
Bleeding: There is a small risk of bleeding during or after the surgery. This is usually minor but can occasionally require further intervention.
Infection: Despite sterile techniques and sometimes post-operative antibiotics, there is a risk of infection at the incision site. Signs of infection include increased redness, swelling, pain, warmth, or pus-like discharge.
Poor Wound Healing: Occasionally, the incision may heal slowly or improperly. In rare cases, the wound might partially open up (known as dehiscence).

Specific Risks of Pre-Auricular Sinus Excision

Scarring: Any incision will result in a scar. While surgeons aim to make the incision as neat as possible and often place it in natural skin creases, a visible scar will remain. Scar management techniques can help improve its appearance over time.
Recurrence: This is one of the most common specific risks, with a chance of recurrence estimated between 5-10%. This happens if a tiny part of the sinus tract is left behind, which can then grow and become infected again. If recurrence happens, revision surgery (another operation) may be necessary. The risk of recurrence is significantly higher if the surgery is performed while there is an active infection. This is why surgeons insist on waiting until any infection has completely settled before operating.
Damage to Surrounding Tissues: The sinus tract can sometimes be close to important structures. There is a very small, rare risk of damage to surrounding tissues.
Facial Nerve Injury: Extremely rarely, the facial nerve (which controls the muscles of facial expression) or nearby blood vessels could be damaged during the dissection. This is a very serious but uncommon complication, and surgeons take great care to avoid it.

The overall risk of complications can vary depending on your general health, age, and the specific condition of your sinus. Your surgeon will discuss these risks with you in detail and answer any questions you may have.

Long-Term Outlook

The long-term outlook after a pre-auricular sinus excision is generally very good, especially when the entire sinus tract has been successfully removed.

Expected Recovery Timeline

While the immediate recovery involves managing discomfort and caring for the wound, the full healing process takes time:

First few days: You will experience mild discomfort, which can be managed with pain relief. Swelling and bruising around the ear are common. You should avoid strenuous activities for at least 1-2 days.
First week: Stitches (if non-dissolvable) are usually removed, or dissolvable stitches continue to break down. Any adhesive strips or tissue glue will start to detach. You can typically resume most normal, non-strenuous activities.
First few weeks: The initial swelling and tenderness will gradually subside. You may still notice some mild swelling for several weeks.
Months ahead: The scar will mature and fade over several months to a year, becoming less noticeable. Consistent scar management, such as massage or silicone gels, can help improve its appearance.

Most children can return to school or daycare when they feel comfortable, often within a day or two after the procedure.

Long-Term Outcomes

The primary goal of the surgery is to prevent future infections and alleviate the symptoms you were experiencing. With a complete excision, the long-term outcome is typically excellent, with satisfactorily low recurrence rates. Most people who undergo this procedure do not experience further problems with their pre-auricular sinus.

Follow-Up Schedule

You will have at least one follow-up appointment with your ENT surgeon. This is usually scheduled around one week to six weeks after your surgery. This appointment is important for the surgeon to check your healing, address any concerns, and ensure there are no signs of complications or recurrence.

When to Seek Urgent Medical Attention

While complications are uncommon, it's important to know when to seek immediate medical advice. Please contact your GP, the hospital ward, or attend your nearest Accident & Emergency (A&E) department if you experience any of the following:

Severe bleeding: If the wound starts to bleed heavily and doesn't stop with gentle pressure.
Signs of infection: Increasing redness, swelling, warmth, or pain around the wound, or if you notice any pus-like (purulent) discharge.
Fever: A high temperature (fever) that doesn't respond to paracetamol.
Increasing pain: If your pain suddenly gets much worse and isn't controlled by your prescribed pain relief.

Your surgical team will provide you with specific contact details for any concerns after your discharge.

Pre-Auricular Sinus Excision

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