Pigmented contact dermatitis (PCD) is a noneczematous variant of contact dermatitis, characterized clinically by hyperpigmentation with little or no signs of dermatitis. The term “pigmented contact dermatitis” was coined by Osmundsen, a Danish dermatologist who described an epidemic of melanosis in Copenhagen.[1] In a series of excellent observations and investigations, he proved that the melan...

Lymphomatoid contact dermatitis is a pseudolymphoma with clinical and histological features of allergic contact dermatitis and cutaneous T cell lymphoma. Incorrect diagnosis may lead to unnecessary testing, unnecessary treatment, or patient harm. The objective of this study is to present a case to demonstrate the diagnostic challenge and overlap between allergic contact dermatitis and cutaneous...

Allergic contact dermatitis caused by phenylethyl resorcinol, a skin-lightening agent contained in a sunscreen María-Antonia Pastor-Nieto1, Paloma Sánchez-Pedreño2, Teresa Martínez-Menchón2, Virginia Melgar-Molero1, Francisco Alcántara-Nicolás1 and Pablo de la Cruz-Murie3 1Dermatology Department, University Hospital of Guadalajara, 19002 Guadalajara, Spain, 2Dermatology Department, University C...

Compresses containing a nonsteroidal antiinflammatory drug (NSAID) are commonly used in Japan. However, this treatment may induce both allergic and photoallergic contact dermatitis from the NSAIDs and their ingredients. Here, we describe a case of allergic contact dermatitis with diffuse erythematous reaction due to diisopropanolamine in the applied compress. The absorption of diisopropanolamin...

Allergists/immunologists see patients with a variety of skin disorders. Some, such as atopic and allergic contact dermatitis, are caused by abnormal immunologic reactions, whereas others, such as seborrheic dermatitis or rosacea, lack an immunologic basis. This review summarizes a select group of dermatologic problems commonly encountered by an allergist/immunologist.

Allergic contact dermatitis is the consequence of an immune reaction mediated by T cells against low molecular weight chemicals known as haptens. It is a common condition that occurs in all races and age groups and affects the quality of life of those who present it. The immunological mechanism of this disease has been reviewed in recent decades with significant advance in its understanding. Th...

reactions, 5 had a history of atopic dermatitis. While some authors sustain that allergic contact dermatitis is less common in patients with such a history, others claim that it is equally common, and still others claim that it is more common.7 Whatever the case, we believe that patch testing could be a useful diagnostic aid in children with foot dermatitis, of allergic or other origin, in whom...

Allergic contact dermatitis caused by poly(hexamethylene) biguanide hydrochloride in contact lens care solutions María-Antonia Pastor-Nieto1, Patricia González-Muñoz1, Raquel Pérez-Mesonero1, Virginia Melgar-Molero1, María-Begoña Pastor-Nieto2, Jesús Zarallo-Gallardo3, Eva Martín-Alcalde4 and Esther De Eusebio-Murillo1 1Department of Dermatology, University Hospital of Guadalajara, Guadalajara ...

Allergic contact dermatitis is very common and may be complicated by secondary infections. Chronic lymphoedema is a potentially debilitating condition, which may occur due to secondary infections or the dermatitis itself. The problem of chronic lymphoedema following allergic contact dermatitis has been infrequently reported. We report a case of a 47-year-old woman with severe allergic contact d...

Systemic contact dermatitis is a dermatitis that may occur in previously sensitized individuals when they are re-exposed to the allergen. Although many drugs have been implicated as a cause of systemic contact dermatitis, local anesthetics derived from caines have been rarely reported. We present a case of systemic contact dermatitis after a digital rectal examination with a urological lubrican...