Parapsoriasis

Parapsoriasis refers to one of a group of skin disorders that are characterized primarily by their resemblance to psoriasis (red, scaly lesions), rather than by their underlying cause.

Parapsoriasis
Specialty	Dermatology

Neoplasms can develop from parapsoriasis.^[1] For example, it can develop into cutaneous T-cell lymphoma.

The word "parapsoriasis" was formed in 1902.^[2]

Classification

The parapsoriasis groups, described and debated for nearly a century, has spawned a confusing nomenclature. There are some authors who prefer to limit the term "parapsoriasis" to large- and small-plaque variants only.^[2] However, the following classification scheme is now generally accepted:^[3]: 450

• Large-plaque parapsoriasis
• Small-plaque parapsoriasis
• Pityriasis lichenoides
  • Pityriasis lichenoides chronica
  • Pityriasis lichenoides et varioliformis acuta
• Lymphomatoid papulosis

See also

• Mycosis Fungoides
• Poikiloderma vasculare atrophicans
• List of cutaneous conditions