Dermatofibrosarcoma Protuberans vs Lipoma

How to tell the difference — key features compared side by side.

Feature
Dermatofibrosarcoma Protuberans
Lipoma
Category
Malignant
Benign
Key feature
Rare slow-growing tumor of the dermis. Looks like a firm plaque or nodule on the trunk - low metastatic potential but high local recurrence.
Soft, rubbery fatty lump under the skin. The most common soft tissue tumor - almost always harmless.
Risk factors
Age 20-50 (most common in young to middle-aged adults); No clearly established environmental risk factors; Previous trauma or surgical scars at the site (debated)
Age 40-60 (most common age at presentation); Genetic predisposition (can run in families); Obesity does not cause lipomas despite both involving fat
Action needed
A slowly growing, firm plaque or nodule on the trunk or limbs
A lump that is hard, firm, or fixed rather than soft and mobile

Dermatofibrosarcoma Protuberans

Dermatofibrosarcoma protuberans (DFSP) is a rare soft tissue sarcoma that begins in the dermis (middle layer of skin). It most commonly appears on the trunk (40-50% of cases), followed by the extremities and head/neck region.

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Lipoma

A lipoma is a slow-growing, soft, rubbery, movable lump located just beneath the skin, composed of mature fat cells enclosed in a thin fibrous capsule. Lipomas are the most common soft tissue tumor, affecting approximately 1 in 1,000 people.

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Does yours look more like dermatofibrosarcoma protuberans?

Quick self-check

Does this look like dermatofibrosarcoma protuberans? Answer 2 questions.

Is it a firm, slowly growing plaque or nodule on the trunk?

Has it been growing gradually over months or even years?

Still not sure?

Our full ABCDE checker evaluates 5 clinical criteria dermatologists use.

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