Clinical variants of pityriasis rosea

Table 1 Clinical classification of pityriasis rosea

Classical adult PR and pediatric PR
Based on herald patch
No herald patch
Only herald patch (absence of secondary lesions)
Multiple herald patches
Herald patch in atypical location
Based on location of lesions
Limited to scalp
Limited to trunk
Limited to limbs-girdle (pityriasis circinata et marginata of Vidal)
Limited to flexures (inverse type)
Limited to the extremities
Acral type
Along the lines of Blaschko
Unilateral
Based on morphology of lesions
Purpuric or hemorrhagic
Urticarial
Erythema multiforme-like
Papular
Follicular
Vesicular
Giant
Hypopigmented
Irritated
Based on course of the disease
Relapsing
Recurrent
Persisting
Relapsing and persisting
PR-like rashes (drug-induced)

PR: Pityriasis rosea.

Table 2 Diagnostic criteria of pityriasis rosea[47]

Mandatory clinical features

Discrete circular or oval lesions

Scaling within most lesions

Peripheral collarette scaling

Optional clinical features

Trunk and proximal limb distribution

Distribution along cutaneous cleavage lines

Previous herald patch