L72.9 Follicular cyst of the skin and subcutaneous tissue, unspecified
ICD10CM code
ICD10CM
Name of the Condition
Follicular cyst of the skin and subcutaneous tissue, unspecified
Also known as: Epidermoid cyst, sebaceous cyst (in colloquial use, though technically distinct).
Summary
Follicular cysts are pockets of tissue that form beneath the skin, filled with keratin, a protein produced naturally by skin cells. They often appear as small, painless bumps and are common skin formations.
Causes
These cysts develop when the hair follicle becomes clogged with dead skin cells. The exact cause is not fully understood, but it can involve trauma to the skin or a blocked sebaceous gland.
Risk Factors
Factors that may increase the likelihood include:
Having acne or previous skin conditions
A history of cysts
Having a skin injury or traumatic acne lesions
Symptoms
Visible bump under the skin, typically on the face, upper chest, or upper back
Sometimes they may become red, swollen, or tender if infected
Diagnosis
Usually diagnosed through physical examination
In some cases, a dermatologist might perform a biopsy to confirm
Treatment Options
Observation: Many cysts resolve without intervention.
Incision and drainage: Done if the cyst becomes painful or infected.
Surgical removal: Complete excision is the most effective method to prevent recurrence.
Prognosis and Follow-Up
Generally benign and often require no treatment.
Regular check-ups necessary if the cyst changes in appearance or becomes symptomatic to rule out possible complications.
Complications
Potential for infection or inflammation leading to pain, redness, and swelling.
Possibility of scarring if the cyst bursts or is improperly drained.
Lifestyle & Prevention
Avoid squeezing or picking at cysts to prevent infection.
Good skincare routine can reduce occurrence, though difficult to fully prevent.
When to Seek Professional Help
Seek medical attention if the cyst is painful, infected, or rapidly growing.