Pigmented Contact Dermatitis
نویسندگان
چکیده
Pigmented Contact dermatitis is a non-eczematous variant of contact dermatitis clinically characterised by reddish-brown to slate grey pigmentation in a reticulate pattern, usually without any active or preceding clinical dermatitis. A detailed history is essential to establish the temporal correlation of exposure to a possible sensitizer, which further helps in differentiating PCD from its close mimickers such as melasma, lichen planus pigmentosus erythema dychromicum perstans, etc. Clinical variants of PCD include Riehl’s melanosis, pigmented cosmetic contact dermatitis, pigmented contact cheilitis and purpuric dermatitis. Histopathology shows pigment incontinence. Patch testing should be performed to identify the causative allergen and besides a papule or vesicle, a brown pigment may develop at the patch test site. Patients should be counselled regarding complete avoidance of the causative allergen and also the resistance of this condition to various treatment modalities.
منابع مشابه
Pigmented contact dermatitis.
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...
متن کاملNoneczematous Contact Dermatitis
Irritant or allergic contact dermatitis usually presents as an eczematous process, clinically characterized by erythematoedematovesicous lesions with intense itching in the acute phase. Such manifestations become erythematous-scaly as the condition progresses to the subacute phase and papular-hyperkeratotic in the chronic phase. Not infrequently, however, contact dermatitis presents with nonecz...
متن کاملPatch testing and histopathology in Thai patients with hyperpigmentation due to Erythema dyschromicum perstans, Lichen planus pigmentosus, and pigmented contact dermatitis.
BACKGROUND Erythema dyschromicum perstans (EDP)/Ashy dermatosis (AD), Lichen planus pigmentosus (LPP) and Pigmented contact dermatitis (PCD) are common skin diseases featuring abnormal pigmentation which have overlapping clinical features. OBJECTIVE To search for differences in the natural history, clinical features, histopathology and relevant contact allergens in patients those were clinica...
متن کاملContact dermatitis in dentistry
Contact dermatitis can affect dentists, orthodontists, technicians, nurses and the patients. The increase of dental patients in recent years caused an increase in reports of dermatitis and other allergies in patients and in dentists too. With changes in dental materials through years, allergy and contact reactions in persons in contact with new allergens had been increased. So dentists and derm...
متن کاملSystemic contact dermatitis to a surgical implant presenting as red decorative tattoo reaction
SCD: systemic contact dermatitis INTRODUCTION Up to 5% of orthopedic implant patients suffer metal-related cutaneous complications caused by delayed-type hypersensitivity reactions, most commonly to nickel, cobalt, and chromium. Both generalized and remote site dermatitis to orthopedic implants are uncommon. Traditional and decorative tattoos have been given for thousands of years around the wo...
متن کامل