ABSTRACT
La dermatosis cenicienta es un trastorno pigmentario infrecuente que se presenta en individuos de piel morena, especialmente en centroamericanos. Las lesiones consisten en manchas hiperpigmentadas de coloración gris-azulada, principalmente localizadas en la cara, tronco y brazos. Su principal diagnóstico diferencial debe ser planteado con tres dermatosis pigmentarias de origen idiopático: eritema discrómico perstans, pigmentación macular eruptiva idiopática y liquen plano pigmentoso. Hay consenso en considerar al eritema discrómico perstans como la misma enfermedad, pero con un borde eritematoso transitorio. La pigmentación macular eruptiva idiopática es clínicamente similar, pero sin una dermatitis de interfase al estudio histopatológico, y sólo muestra una pigmentación de la capa basal, incontinencia pigmentaria y melanófagos en la dermis. Finalmente, el liquen plano pigmentoso debe ser considerado como una variedad pigmentada de liquen plano.
Ashy dermatosis is an infrequent disorder of pigmentation, which predominantly occurs in darkly pigmented individuals, specially in central americans. The lesions consist of bluish-gray hyperpigmented patches mainly located on the face, trunk and arms. Its main differential diagnosis must be raised with three idiopathic pigmentary disorders: erythema dyschromicum perstans, idiopathic eruptive macular pigmentation and lichen planus pigmentosus. It has been widely accepted that erythema dischromicum perstans is the same disease, but with a transient erythematous border. Idiopathic eruptive macular pigmentation is clinically similar but without an interfase dermatitis at histopathologic studies, only showing increased pigmentation of the basal layer and pigmentary incontinence and many melanophages in the dermis. Finally, lichen planus pigmentosus must be considered as a pigmented variant of lichen planus.
Subject(s)
Humans , Pigmentation Disorders/diagnosis , Erythema/diagnosis , Pigmentation Disorders/pathology , Diagnosis, Differential , Erythema/pathology , Lichen Planus/diagnosisABSTRACT
La pigmentación macular eruptiva idiopática (PMEI) afecta principalmente a niños y adolescentes. Se caracteriza por manchas ovales diseminadas, de color café claro o gris pizarra, asintomáticas, de evolución crónica, involución espontánea y etiología desconocida. Se realizó un estudio retrospectivo y descriptivo, de corte transversal, mediante la revisión de las historias clínicas y archivos histológicos de pacientes con diagnóstico de PMEI correspondientes al período que va de noviembre de 2006 a julio de 2009.En el lapso estudiado se diagnosticó PMEI en siete pacientes. Rango de edad: 5-18 años (media:10,14 años), sexo femenino (100%). No se observaron antecedentes relacionados con la patología. El tiempo de evolución varió entre 1 y 36 meses (media: 11,28 meses) a partir del momento de la consulta. El seguimiento posterior se realizó en 4 casos, y 3 no regresaron a control. En todos los casos se realizaron estudios histopatológicos, en los cuales se observaron los criterios propios descriptos para esta entidad. Conclusiones. Las características clínicas y la edad de comienzo concuerdan con los reportes de la literatura. Todos los pacientes eran de sexo femenino, a diferencia de los casos previamente reportados, donde no hay diferencias entre ambos sexos o sólo un leve predominio del sexo masculino.
Idiopathic eruptive macular pigmentation (IEMP) affects mostly children and adolescents. It ischaracterized by scattered oval spots, light brown or slate gray, asymptomatic, a chronic evolution,spontaneous resolution and unknown etiology.We performed a retrospective cross-section analysis through review of clinical and histological recordsof patients with diagnosis of IEMP for the period November 2006 to July 2009.During the period of study IEMP was diagnosed on 7 patients. Age range: 5-18 years (media: 10.14years), female (100%). There was no previous history related to the disease.The duration of evolution ranged from 1 month to 36 months (media: 11.28 months) from thetime of consultation. Subsequent follow-up was performed on four patients, of which three didnot return to control. In all cases histopathological studies were performed, fulfilling the criteriadescribed for this entity.
Subject(s)
Humans , Adolescent , Female , Child , Hyperpigmentation/pathology , Skin/pathology , Skin DiseasesABSTRACT
A 21-year-old male presented with numerous asymptomatic dark brown to brown black pigmented macules and barely raised plaques on the face, trunk and extremities, developing over a period of 2 year. The surface of most lesions had a velvety raised surface similar in appearance to acanthosis nigricans and a biopsy from one of the lesions showed pigmented papillomatosis. This case fulfils all the criteria for idiopathic eruptive macular pigmentation (IEMP) with papillomatosis, and the clinical appearance of acanthosis nigricans in most lesions suggests that IEMP is a form of eruptive acanthosis nigricans.
ABSTRACT
Idiopathic eruptive macular pigmentation is a rare condition characterized by asymptomatic pigmented macules involving the neck, trunk, and proximal portions of the extremities. On histopathologic examination, there was increased pigmentation of the basal layer in otherwise normal epidermis and scattered melanophages in the papillary dermis. We report a case of a 26-year-old woman with idiopathic eruptive macular pigmentation involving only the flexural areas of the body. This condition should be considered in the differential diagnosis of flexural hyperpigmented skin lesions.
Subject(s)
Adult , Female , Humans , Acanthosis Nigricans , Dermis , Diagnosis, Differential , Epidermis , Extremities , Hyperpigmentation , Neck , Pigmentation , Skin , Skin Diseases, Genetic , Skin Diseases, PapulosquamousABSTRACT
Idiopathic eruptive macular pigmentation is a relatively rare disease entity characterized by asymptomatic, pigmented macules involving the face, neck, trunk, and proximal limbs. We report a case of idiopathic eruptive macular pigmentation in a 19-year-old female patient, who presented with brown colored macular pigmentation which started appearing at the age of seven. The skin lesion gradually increased in numbers and in size over trunk, neck and face without any history of prior inflammation or drug intake. The lesion showed no improvement with chemical peeling or laser therapy. The histologic study revealed an increased epidermal basal layer pigmentation and many melanophages in the papillary dermis. The patient was treated with 2% hydroquinone for six months on the face to disclose satisfactory improvement.