Pityriasis rosea (PR) is a common erythemato-squamous dermatosis which almost always, is easily diagnosed. Mostly the disease presents in its classical form. However, clinical dermatology is all about variations and PR is not an exception. Variants of the disease in some cases may be troublesome to diagnose and confuse clinicians. Prompt diagnosis and treatment of the condition becomes necessar...

The differential diagnosis of erythemato-squamous diseases is a difficult problem in dermatology. Artificial Neural Network (ANN) classifies the given samples when trained and nearly 98 % classification accuracy is achieved. Generalized Feed Forward Neural Network (FFNN) can solve the multivariable classification problem of determination of skin disease. ANN approach is studied to determine the...

Fixed Pigmented Erythema (FPE) is a drug reaction. Pityriasis rosea of Gibert (PRG) is a cutaneous virus due to the reactivation of (HHV7/HHV6). We report here a case of FPE, the second episode simulating an initial double medallion PRG in a young adult. Our case confirmed the assertion that toxidermia is a major simulator of the other dermatoses behind the syphilis.

Pityriasis lichenoides is an uncommon, acquired, idiopathic, self-limiting skin disease that poses a challenge to patients and clinicians to diagnose and treat. Several variants exist including pityriasis lichenoides et varioliformis acuta (PLEVA), pityriasis lichenoides chronica (PLC), and febrile ulcer-onecrotic Mucha-Habermann disease. Precise classification can be difficult due to an overla...

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...