H70.81

Clinical Causes: Chronic infections of the ear or surrounding tissues, such as cholesteatoma Complications from ear surgeries like mastoidectomy or canal wall-down procedures Previous trauma or injury to the area behind the ear Persistent or recurrent dermatitis or skin infections in the postauricular region Malfunction or breakdown of previous surgical closures or repairs

Key Symptoms: A visible or palpable lump or swelling behind the ear Discharge or pus from the fistula opening Persistent or intermittent itching or discomfort around the affected area Redness and tenderness of the skin behind the ear Possible foul odor if infection is involved Occasional ear pain or hearing changes, depending on associated ear conditions

Diagnosis Path: Diagnosis of a postauricular fistula involves a comprehensive clinical examination. Healthcare providers will inspect the area behind the ear for any abnormal openings, swelling, or discharge. In some cases, imaging studies such as CT scans may be recommended to evaluate the extent of tissue involvement and to detect any underlying infection or cholesteatoma. A detailed medical history regarding previous ear surgeries or infections is also important for accurate diagnosis.

Treatment Protocols: Treatment strategies aim to close the fistula, eradicate any ongoing infection, and prevent recurrence. Approaches may include: - **Surgical Repair:** The primary treatment often involves a surgical procedure to remove the fistula and close the abnormal opening. Surgeons may use local tissue flaps or grafts to ensure a durable closure. - **Antibiotics:** If infection is present, a course of antibiotics may be prescribed to control the infection before and after surgery. - **Drainage:** In cases of abscess formation, drainage might be necessary prior to definitive closure. - **Management of Underlying Conditions:** Addressing conditions like cholesteatoma or chronic dermatitis helps in reducing the risk of recurrence. Recovery involves careful wound care and follow-up visits to monitor healing. In some situations, more extensive surgery might be required if the fistula involves deeper structures or recurrent issues.