Epidermoid Cyst

An epidermoid cyst is a benign skin tumor, which is a cavity lined with the epidermis and filled with contents consisting of keratin and lipids. The cyst is formed due to blockage of the excretory duct of the sebaceous gland and the subsequent accumulation of secretion inside it.

Epidermoid cysts most often occur on the face, neck, trunk, and upper extremities. They have a densely elastic consistency, a smooth surface and can reach a size from several millimeters to several centimeters. When pressing on the cyst, whitish contents may be released.

The cyst is usually painless unless it becomes infected. In such cases, tenderness, redness and swelling around the tumor appear.

Diagnosis is based on history and physical examination. If necessary, a puncture biopsy or a complete histological examination of the removed cyst is performed.

Treatment consists of surgical excision of the cyst. Relapses after removal of epidermoid cysts are rare.



An epidermoid cyst, also known as a sebaceous cyst, is a benign growth that can occur on the skin or inside the body. An epidermoid cyst is formed from cells in the epidermis, the outer layer of the skin, and often contains keratin, a protein substance commonly found in skin, hair and nails.

Although epidermoid cysts can occur on any part of the body, they are most common on the face, neck, back, or groin area. They can range in size from a few millimeters to several centimeters and are usually round or oval in shape. The skin over the cyst may be normal or slightly discolored, depending on its location and size.

The causes of epidermoid cysts are not always completely understood. However, congenital anomalies, trauma, diseases of the sebaceous glands, or difficulty in releasing sebaceous gland secretions can contribute to their formation. Cysts often grow slowly and may remain unnoticed for a long time until they become large enough or cause symptoms.

Symptoms associated with epidermoid cysts can vary depending on their location and size. Cysts usually do not cause pain and may be silent. However, if the cyst is near nerves, organs, or blood vessels, it may cause discomfort or pressure on surrounding tissues and structures.

The diagnosis of an epidermoid cyst is usually based on clinical examination and the patient's medical history. In some cases, additional testing such as ultrasound, computed tomography (CT) or magnetic resonance imaging (MRI) may be needed to more accurately determine the size and location of the cyst.

Treatment of epidermoid cysts usually involves surgical removal. In most cases, the cyst can be completely removed, and recurrences are rare. However, some conditions or characteristics of the cyst may require a specialized treatment approach.

In general, an epidermoid cyst is a common benign growth that usually does not cause serious problems and can be successfully removed by surgery. If you suspect an epidermoid cyst or any other growth on the skin or inside the body, it is recommended that you consult a doctor for diagnosis and specific medical advice.