Pityriasis Versicolor is NOT Palpable
Pityriasis versicolor presents as flat, non-palpable macules or patches with fine scaling—the lesions themselves are not raised or palpable to touch. This is a defining characteristic that distinguishes it from other dermatological conditions.
Clinical Presentation
Pityriasis versicolor is a superficial fungal infection caused by Malassezia species that affects only the stratum corneum (outermost layer of skin). The typical presentation includes:
- Flat lesions: Hypopigmented (85.8% of cases) or hyperpigmented macules and patches 1
- Fine scaling: The most consistent feature, observed in 88.7% of patients on dermoscopic examination 2
- Distribution: Primarily affects seborrheic areas including chest, back, shoulders, and upper trunk 3, 1
Why They Are Not Palpable
The infection remains superficial, confined to the outermost skin layer without dermal involvement. While the fine scale may be appreciated on close examination or with gentle scraping, the lesions themselves do not have elevation or induration. In one study, patches were observed in 53.1% and macules in 46.9% of patients—both are by definition flat, non-palpable lesions 1.
Important Clinical Caveat
Do not confuse pityriasis versicolor with rare papular variants or other fungal infections. While extremely rare papular presentations have been documented in case reports 4, these are exceptional variants. The standard presentation you will encounter in clinical practice consists of flat, scaly, discolored patches that are not palpable.
Practical Examination Tips
- The fine scale becomes more apparent with gentle scraping
- Dermoscopy reveals fine scaling and pigmentary changes without elevation 2
- Wood's lamp examination may show yellow-green fluorescence
- The "spaghetti and meatballs" appearance on KOH mount confirms diagnosis 3
If you encounter raised, palpable lesions in what appears to be a fungal infection, consider alternative diagnoses such as disseminated candidiasis (which presents with palpable nodules) or other deep fungal infections 5.