BACKGROUND Pityriasis lichenoides chronica (PLC) and pityriasis lichenoides et varioliformis acuta (PLEVA) are benign T-cell diseases that share several overlapping clinicopathologic features, leading many to believe that they exist as a spectrum rather than as single entities. Previous molecular studies have shown that PLEVA is a clonal lymphoproliferative disorder. To further characterize the...

background and objective: seborrheic dermatitis (sd) is a frequent disorder of the skin that is distinguished by the development of erythematous patches and yellow-gray scales. it is a multifactor disease that requires predisposing factors for its progress. presence of these factors leads to reproduction of opportunistic yeast malassezia spp.the aim of the present study was to isolate and ident...

This report describes the case of a 76 year old man who suffered from febrile ulceronecrotic Mucha–Habermann disease (FUMHD). Despite this patient’s typical clinical and histological findings, the fulminating course led to death. Polymerase chain reaction (PCR) analysis of the skin lesions showed that the infiltrating cells were monoclonal in origin and were from an aberrant clone. FUMHD is a v...

© 2014 The Authors. doi: 10.2340/00015555-1791 Journal Compilation © 2014 Acta Dermato-Venereologica. ISSN 0001-5555 Pityriasis lichenoides et varioriformis acuta (PLEVA), also known as Mucha-Habermann disease, is an uncommon, idiopathic, acquired dermatosis characterised by erythematous and scaly papules that are often accompanied by haemorrhagic and papulonecrotic lesions. The patient’s gener...

<p class="abstract">Pityriasis rubra pilaris (PRP) are a group of clinically similar papulo squamous dermatoses which present with erythematous, hyperkeratotic perifollicular papules tend to coalesce form plaques and may progress erythroderma. We report case 46-year-old female patient who came chief complaint itching burning sensation scaly patches on extremities since one year. On dermat...

Papulo- and vesiculo-necrotic lesions are rare manifestations of secondary syphilis. Until now it has been described only in HIV-infected patients with advanced stages of immunosuppression. This case report describes an unusual case of PLEVA-like syphilis in a 33-year-old man with newly diagnosed HIV infection. Despite that the CD4 cells level and viral load did not indicate the advance stage o...

Pityriasis rosea (PR) is a benign papulosquamous disorder seen commonly in clinical practice. Despite its prevalence and benign nature, there are still times when this common disorder presents in an uncommon way or course posing diagnostic or management problems for the treating physician. The etiopathogenesis of PR has always been a dilemma, and extensive research is going on to elicit the exa...

lipophilic yeast of the genus malassezia (pityrosporum) belongs to the normal flora of human skin and many warm-blooded animals. these fungi can produce a diverse range of diseases that the best known and most frequent of them is pityriasis versicolor, a chronic recurrent skin disease occurring primarily in tropical regions. the genus malassezia has been recently enlarged to include seven disti...

background malassezia species as skin microflora of humans and other warm-blooded vertebrates are the lipophilic yeasts associated with various human diseases, especially pityriasis versicolor (pv). objectives the objective of this study was to identify the malassezia species of scraped skin of pv patients in yazd, iran, using morphological, biochemical and physiological methods. we also compar...

Patients with the skin disorder pityriasis lichenoides et varioliformis acuta (PLEVA) develop recurrent, self-healing papulonecrotic lesions that contain infiltrates of cytologically and antigenically normal T lymphocytes. DNA extracted from the lesions of 3 patients with PLEVA was analyzed for rearrangement of beta-T-cell receptor genes for the purpose of assessing the clonality of T lymphocyt...