An epidermoid cyst, also known as a sebaceous cyst, is a noncancerous, closed sac beneath the skin. It formed from cells that make up the outermost layer of the skin (epidermis). These cysts filled with a substance that resembles cottage cheese or a thick, oily material. Epidermoid cysts are generally slow-growing and may or may not cause symptoms.
Here are some key points about epidermoid cysts:
Characteristics:
- Appearance: Epidermoid cysts typically present as round or oval lumps beneath the skin.
- Contents: The cysts contain a thick, yellow, cheesy material composed of dead skin cells, oil, and other debris.
- Size: They can vary in size, and in some cases, they may grow larger over time.
Common Locations:
- Epidermoid cysts can develop on various parts of the body, but they are commonly found on the face, neck, chest, back, or genital area.
Symptoms:
- Most epidermoid cysts are asymptomatic and painless.
- If the cyst becomes infected, it may become red, swollen, and tender.
Treatment:
- Epidermoid cysts are generally benign, and treatment may not be necessary unless they cause discomfort, are cosmetically undesirable, or become infected.
- If needed, treatment options may include drainage, steroid injections, or surgical removal.
Causes:
- Epidermoid cysts form when the opening of a hair follicle becomes blocked, leading to the accumulation of dead skin cells and oil beneath the skin.
