Home
Chapter Home
Jobs
Conferences
Fellowships
Books
Advertisement
Skin-nontumor / Clinical Dermatology
Other dermatoses
Pityriasis lichenoides et Varioliformis Acuta
Reviewer: Mowafak Hamodat, MB.CH.B, MSc., FRCPC, Eastern Health, St. Johns, Canada (see Reviewers
page)
Revised: 1 August 2011, last major update August 2011
Copyright: (c) 2002-2011, PathologyOutlines.com, Inc.
Definition
=========================================================================
● Also called PLEVA, Mucha-Habermann disease
● Overlaps with pityriasis lichenoides chronica
● Sudden onset of crops of small, ulcerated papules on trunk
● May heal with superficial scarring resembling variola (smallpox)
Micro description
=========================================================================
● Acute lesion shows epidermal changes with much exaggerated scale; marked inter- and intracellular edema accompanied by keratinocyte necrosis and interface changes
● Exocytosis is usually prominent and intraepidermal red blood cells are characteristic
● Upper dermis is edematous and contains wedge shape of lymphocytes and histiocytes, usually perivascular, varies from sparse to dense; prominent red cell extravasation
Additional references
=========================================================================
End of Skin-nontumor / Clinical Dermatology > Other dermatoses > Pityriasis lichenoides et Varioliformis Acuta
This information is intended for physicians and related personnel, who understand that medical information is often imperfect, and must be interpreted in the context of a patient's clinical data using reasonable medical judgment. This website should not be used as a substitute for the advice of a licensed physician.
All information on this website is protected by copyright of PathologyOutlines.com, Inc. Information from third parties may also be protected by copyright. Please contact us at copyrightPathOut@gmail.com
with any questions (click here for other
contact information).