Pseudocyst of the auricle

Pseudocyst of the Auricle

Anatomy of the human ear, showing the auricle.

A pseudocyst of the auricle is a benign condition characterized by the accumulation of serous fluid between the layers of the auricle, or outer ear. This condition is also known as "auricular pseudocyst" or "benign idiopathic cystic chondromalacia". It typically presents as a painless, fluctuant swelling on the anterior aspect of the auricle.

Pathophysiology

The exact cause of pseudocyst of the auricle is not well understood. It is believed to result from a defect in the cartilage of the auricle, leading to the accumulation of fluid. The condition is more common in males and often occurs in the third to fifth decades of life. The fluid collection is typically serous and non-inflammatory, distinguishing it from other conditions such as perichondritis or hematoma of the auricle.

Clinical Presentation

Patients with a pseudocyst of the auricle usually present with a painless swelling on the ear. The swelling is typically soft and fluctuant, and it may vary in size. It is most commonly located on the scaphoid fossa or the triangular fossa of the auricle. The overlying skin is usually normal in appearance, without signs of inflammation or infection.

Diagnosis

Ultrasound imaging can be used to confirm the diagnosis of a pseudocyst.

Diagnosis of a pseudocyst of the auricle is primarily clinical, based on the characteristic appearance and location of the swelling. Imaging studies, such as ultrasound, can be used to confirm the presence of fluid and to differentiate the pseudocyst from other conditions. Ultrasound typically shows an anechoic or hypoechoic fluid collection without internal septations.

Treatment

The treatment of pseudocyst of the auricle involves aspiration of the fluid and compression to prevent recurrence. Aspiration alone often leads to recurrence, so additional measures such as compression dressings or surgical intervention may be necessary. Surgical options include incision and drainage with the placement of a bolster dressing or excision of the cyst wall.

Prognosis

The prognosis for patients with a pseudocyst of the auricle is generally good. With appropriate treatment, the condition can be resolved without significant complications. However, recurrence is common if the underlying defect in the cartilage is not addressed.

Related Pages

• Auricle (anatomy)
• Perichondritis
• Hematoma
• Chondromalacia