Pityriasis rosea (PR) is an acute, self-limited papulosquamous dermatosis localized on the trunk and extremities, that affects otherwise healthy adolescents and young adults. Although the classic presentation is readily recognized, atypical forms may present a challenge. Many atypical forms of the disease have been reported in the literature.[1]We report two cases with atypical features. Involv...

Approximately20%ofpatientspresentwithatypicalorvariant formsof PR,which are less readily recognized than typical eruptions and may pose a diagnostic challenge.2,3 The morphologic characteristics of the eruption may be papular, vesicular, purpuric or hemorrhagic, or urticarial. Very small lesions will be observed in papular PR, and PR with enormous plaques is known as pityriasis rosea gigantea o...

Pityriasis rosea (PR) may have atypical presentations as regards morphology and distribution of the lesions. Recently, several forms of PR considered atypical for the course of the disease have been described. Differently from the typical PR that resolves within 2-12 weeks, relapsing and persistent PR forms (lasting longer than 12 weeks) have been described in adults and children. Lesions of th...

We established and validated diagnostic criteria for pityriasis rosea and Gianotti-Crosti syndrome. In this paper, we compare and contrast both diagnostic criteria to formulate a protocol in establishing diagnostic criteria for other dermatological diseases. The diagnostic criteria are similar in employing clear dividing lines and conjunctions ('and/or') to assure high reliability. Both sets of...

OBJECTIVE To detect temporal case clustering in patients with pityriasis rosea in different geographic locations. DESIGN Regression analysis of dates on which 1379 patients were diagnosed as having pityriasis rosea in 3 different geographic locations. The control data consisted of dates of diagnosis of patients with psoriasis in the same settings. SETTING Dermatology clinics in Kuwait, Minn...

218 Indian Dermatology Online Journal | Volume 8 | Issue 3 | May‐June 2017 Many viruses including HHV6 and HHV7 have been proposed as causative agents for pityriasis rosea, although there is no conclusive evidence. Here, we presented a case of pityriasis rosea coexisting with oral HSV1 infection. Our case is unique because purpuric pityriasis rosea has not been associated with HSV1 previously. ...

Scabies, a mite infestation caused by 'Sarcoptes scabiei', most commonly presents as pruritic linear burrows where the mite has invaded the skin. Scabies variant such as bullous, crusted, hidden, incognito, nodular and scalp-mimic the other conditions. In addition, atypical presentations of scabies can masquerade as dermatitis herpetiformis, ecchymosis, Langerhans cell histiocytosis, systemic l...

BACKGROUND Pityriasis rosea is an acute, self-limiting disease, probably infective in origin, affecting mainly children and young adults, characterized by distinctive skin eruptions and minimal constitutional symptoms. Both oral Erythromycin and oral Acyclovir have been used in its management. OBJECTIVES To compare the effectiveness of oral Erythromycin and oral Acyclovir in the treatment of ...

OBJECTIVE To examine the proposed association between pityriasis rosea and human herpesvirus 7 (HHV-7). DESIGN A retrospective cross-sectional survey. SETTING University medical center in Switzerland. PATIENTS Thirteen patients with pityriasis rosea and 14 persons with normal skin (control subjects). MAIN OUTCOME MEASURES Detection of HHV-7-specific DNA sequences and antigen (85-kd phos...