Pityriasis lichenoides chronica

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Pityriasis lichenoides chronica
Synonyms Chronic guttate parapsoriasis, Chronic pityriasis lichenoides, Dermatitis psoriasiformis nodularis, Parapsoriasis chronica, Parapsoriasis lichenoides chronica
Classification and external resources
Specialty dermatology
ICD-10 L41.1
ICD-9-CM 696.2
eMedicine derm/334

Pityriasis lichenoides chronica is an uncommon, idiopathic, acquired dermatosis, characterized by evolving groups of erythematous, scaly papules that may persist for months.[1]:456[2]:737


Although other forms of the disease occur at younger ages, some individuals start having long term symptoms at thirty years of age. This disease also affects adolescents and young adults. This also affects the immune system which therefore results in rashes. The symptoms rarely affect the face or scalp, but occurs at other sites of the body. The duration may last for months or even several years. For instance, new crops of lesions appear every few weeks.[3]


Pityriasis lichenoides chronica (PLC) is probably caused by a hypersensitivity reaction to infectious agents such as the Epstein–Barr virus. Other infectious agents include the adenovirus and Parvovirus B19.[4]



There is no standard treatment for PLC. Treatments may include ultraviolet phototherapy, topical steroids, sun exposure, oral antibiotics, corticosteroid creams and ointments to treat rash and itching.[3][5]

One study identified the enzyme bromelain as an effective therapeutic option for PLC.[6]

See also[edit]


  1. ^ Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. ISBN 0-07-138076-0.
  2. ^ James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0. 
  3. ^ a b "-". Archived from the original on 2010-11-15. 
  4. ^ Jeffrey S Henning DO. "Pityriasis lichenoides chronica". dermatology.cdlib.org. 
  5. ^ "Pityriasis lichenoides chronica [eScholarship]". 
  6. ^ "Role of bromelain in the treatment of patients with pityriasis lichenoides chronica". 

External links[edit]