Idiopathic eruptive macular pigmentation

We present the case of a 10-year-old girl with a six months history of disseminated asymptomatic, brown pigmented macules on the trunk and proximal parts of the extremities. The clinical picture, histological findings, and the course of disease were similar to those of idiopathic eruptive macular pigmentation. The cutaneous lesions gradually disappeared over the next two years without any treatment, and no relapse occurred. The knowledge of this disease is important in order to avoid unnecessary treatment as spontaneous resolution of the lesions may be expected within months or a few years. The spontaneous regression without any treatment is an additional diagnostic criterion.     

特发性发疹性斑状色素沉着症

报告1例特发性发疹性斑状色素沉着症.患者男,27岁.因背部、胸部出现浅灰色色素沉着斑1个月余就诊.否认发病前有炎症性皮肤病史,无用药史.皮肤科检查:背部、胸部散在直径0.5～2.5 cm浅灰色色素沉着斑,呈均匀一致的细网纹状,皮损境界大致清楚,互不融合,表面光滑无鳞屑.皮损组织病理检查:基底层黑素增多,基膜完整,未见细胞空泡化变性,真皮有较多噬黑素细胞.4个月后随访,约75%色素斑已消退或颜色变淡.诊断:特发性发疹性斑状色素沉着症.     

Idiopathic eruptive macular pigmentation: report on two cases

Idiopathic eruptive macular pigmentation (IEMP) is a rather under-reported condition of unknown etiology. Clinically consisting of benign hyperpigmented macules, the condition is characterized histopathologically by dermal melanization. It must be differentiated from lichen planus pigmentosus, erythema dyschromicum perstans, fixed drug eruption and mastocytosis.     

Idiopathic eruptive macular pigmentation with papillomatosis: Report of nine cases

Nine patients, seven males and two females aged 6-14 years, presented with extensive, asymptomatic, brown-black macules and mildly elevated, pigmented lesions of a few months' duration. The sites affected were the face, trunk and proximal extremities. The skin lesions were discrete and individual lesions were less than 2 cm in size. The clinical diagnoses rendered by the referring physicians were lichen planus pigmentosus, urticaria pigmentosa, erythema dyschromicum perstans and postinflammatory hyperpigmentation. Histology in all nine cases showed papillomatosis of the dermis with prominent pigmentation of the basal layer (pigmented papillomatosis) without any significant dermal inflammation. Two cases had spores of Pityrosporum ovale in the thickened horny layer, one of which also had, in addition, bacterial colonies in the stratum corneum. The pigmentation resolved on its own over several months. This presentation is similar to the previously described idiopathic eruptive macular pigmentation with the additional histological finding of papillomatosis that is being described for the first time and may be nosologically related to acanthosis nigricans and confluent and reticulate papillomatosis.     

Idiopathic eruptive macular pigmentation in a pediatric patient and a review of the literature

Idiopathic eruptive macular pigmentation (IEMP) is a rare, benign, self-resolving melanosis consisting of hyperpigmented macules typically on the face, trunk, and extremities that can occur in children and adolescents and often presents a diagnostic conundrum. We report a case involving an 8-year-old female whose previous clinical presentation was concerning for an atypical presentation of cutaneous mastocytosis or neurofibromatosis. The clinical and histopathologic evaluation was consistent with the diagnosis of IEMP, and no active intervention was pursued. Our accompanying literature review serves to better characterize this condition, highlight key diagnostic features, and emphasize the tendency for spontaneous resolution to avoid unnecessary treatments with limited clinical efficacy.     

A global consensus statement on ashy dermatosis,erythema dyschromicum perstans,lichen planus pigmentosus,idiopathic eruptive macular pigmentation,and Riehl's melanosis

Ashy dermatosis (AD), lichen planus pigmentosus (LPP), erythema dyschromicum perstans (EDP), and idiopathic eruptive macular pigmentation are several acquired macular hyperpigmentation disorders of uncertain etiology described in literature. Most of the published studies on these disorders are not exactly comparable, as there are no clear definitions and different regions in the world describe similar conditions under different names. A consensus on the terminology of various morphologies of acquired macular pigmentation of uncertain etiology was a long-felt need. Several meetings of pigmentary disorders experts were held to address this problem. A consensus was reached after several meetings and collation of e-mailed questionnaire responses and e-mail communications among the authors of publications on the above conditions. This was achieved by a global consensus forum on AD, LPP, and EDP, established after the 22nd International Pigment Cell Conference held in Singapore in 2014. Thirty-nine experts representing 18 countries participated in the deliberations. The main focus of the deliberations was terminology of the conditions; as such, we present here the consensus statement of the forum and briefly review the available literature on the subject. We have not attempted to discuss treatment modalities in detail.     

Idiopathic pigmentation of the hands. Professional exogenous ochronosis? A new entity?

Summary A case of ochronosis-like pigmentation of the hands is described. The following criteria were fulfilled: (1) presence of blue to black spots confined to the hands; (2) pitch-black macroscopic appearance of the biopsy specimen; (3) abundance of granular material in the whole connective structures on microscopic examination of an unstained specimen just mounted on a slide; (4) numerous pigmented granules in the elastic and the collagen fibers; (5) no family history, abnormal coloration of the urine, taking of drugs, or rheumatism; (6) onset in a manual worker exposed to benzenic substances.This seems to be a new entity, probably a variant of exogenous ochronosis produced by professional contacts with some agents and perhaps a professional benzenic ochronosis.