the Differences Between Sebaceous Cysts and Lipomas - Dermatology

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Sebaceous cysts and lipomas are two distinct types of lumps that can occur in the skin, and understanding their differences is crucial for proper diagnosis and treatment.
Sebaceous Cysts: These are often referred to as epidermoid cysts or pilar cysts. They are typically filled with a thick, yellowish substance called keratin, which is a protein found in skin cells. Sebaceous cysts usually arise from hair follicles and can occur anywhere on the body, but they are most commonly found on the face, neck, and trunk. They can become inflamed or infected, leading to redness, swelling, and sometimes the formation of pus. When a sebaceous cyst becomes infected, it may require drainage or surgical removal.
Lipomas: In contrast, lipomas are benign tumors made up of adipose (fat) tissue. They are soft, movable lumps that can occur anywhere on the body, but they are most commonly found on the torso, arms, and thighs. Lipomas are generally painless and slow-growing. They are usually not associated with inflammation or infection, and they do not typically require treatment unless they become bothersome or for cosmetic reasons.
In your case, you mentioned that you had a sebaceous cyst near your breast that became inflamed and required drainage. The recent lump you have noticed in the same area that is movable could potentially be a lipoma, especially if it feels soft and does not cause pain. However, it is essential to consult a healthcare professional for an accurate diagnosis.
Diagnosis and Treatment: To differentiate between a sebaceous cyst and a lipoma, a doctor may perform a physical examination and, if necessary, imaging studies such as an ultrasound. In some cases, a biopsy may be performed to confirm the diagnosis.
If the lump is determined to be a lipoma, treatment is usually not required unless it causes discomfort or cosmetic concerns. In contrast, if it is a sebaceous cyst that becomes infected or symptomatic, treatment may involve drainage or surgical removal.
Conclusion: While both sebaceous cysts and lipomas are benign, they have different characteristics and implications for treatment. It is important to monitor any changes in the lumps and consult a healthcare provider for a proper evaluation. If you notice any signs of infection, such as increased redness, warmth, or discharge, seek medical attention promptly.
In summary, while sebaceous cysts are filled with keratin and can become inflamed, lipomas are soft, fatty tumors that are generally harmless. Given your history and the nature of the new lump, a medical evaluation is the best course of action to ensure appropriate management.