Epidermal Cyst (Epidermoid Cyst)

Epidermal (epidermoid/infundibular) cyst is benign subcutaneous cyst filled with keratin, on face/trunk/scrotum, presenting with dome-shaped nodule with central punctum. Treatment: surgical complete excision (including sac) to prevent recurrence; incision/drainage if infected; oral antibiotics for secondary infection; marsupialization for large; monitor for malignant transformation (rare, to SCC); avoid squeezing; follow-up dermatology/surgery; biopsy if atypical/growing rapidly.

Common Symptoms

Dome-shaped subcutaneous nodule; central punctum; keratin discharge; face/trunk/scrotum

Causes and Pathogenesis

Implanted epidermis grows into dermis producing keratin-filled cyst.

Treatment

Surgical excision; I&D if infected; antibiotics; watch for malignancy

Preventive Measures

Avoid squeezing; gentle skin care.

Department to Visit

It is recommended to visit the Dermatology/General-surgery department; an appointment can be booked on this platform before the visit.

Warm reminder: The above information is for health science reference only and cannot replace professional medical diagnosis. If you have related symptoms, please seek medical attention at a regular hospital promptly.