Seborrheic psoriasis, also known as sebopsoriasis, is a skin condition exhibiting characteristics of both seborrheic dermatitis and psoriasis. It's essentially an overlap syndrome, presenting a combination of symptoms from both conditions.
Key Characteristics of Sebopsoriasis:
Sebopsoriasis can be identified by the following characteristics that distinguish it from classic psoriasis or seborrheic dermatitis:
- Scale Appearance: It presents with yellowish, greasy scales, which is more typical of seborrheic dermatitis.
- Affected Areas: Lesions typically appear in areas common to seborrheic dermatitis, such as:
- Scalp
- Nasolabial folds (lines from the nose to the corners of the mouth)
- Eyebrows
- Behind the ears
- Over the sternum (breastbone)
- Inflammation and Margins: The affected areas are often deeper red with more defined margins, and the scales are thicker than usually observed in seborrheic dermatitis.
- Scale Color: The scales are less silvery than those found in classic psoriasis.
Differentiation from Similar Conditions:
| Feature | Seborrheic Psoriasis (Sebopsoriasis) | Seborrheic Dermatitis | Psoriasis |
|---|---|---|---|
| Scale Appearance | Yellowish, greasy | Yellowish, greasy | Silvery, thick |
| Inflammation | Deeper red, more defined margins | Mildly red, less defined margins | Red, well-defined margins |
| Scale Thickness | Thicker than seborrheic dermatitis | Thinner | Thick |
| Typical Areas | Scalp, nasolabial folds, eyebrows, behind ears, sternum | Scalp, nasolabial folds, eyebrows, behind ears, sternum | Elbows, knees, scalp, lower back |
