We propose a model of functional human skin anatomy in which ESGs are closely associated with the PSU and the dWAT to form a common homeostatic tissue environment, which may best be encapsulated in the term 'adnexal skin unit'. The challenge now is to dissect how each component of this superstructure of human skin functionally cooperates with and influences the other under physiological conditions, during regeneration and repair and in selected skin diseases.
Progressive macular hypomelanosis (PMH) is a condition of unknown etiology characterized by asymptomatic, hypopigmented macules located predominantly on the trunk. We recorded 12 adolescents with PMH over a 6-month period. Ten were female, and the mean age was 16.6 years. The average time from the patients first noticing pigment change to diagnosis was 15 months. PMH is probably an underdiagnosed condition.
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