Progressive Macular Hypomelanosis : A Rarely Diagnosed Hypopigmentation in Caucasians

الملخص EN

A 35-year-old woman who developed whitish macules on trunk and limbs at 12 years of age and observed a remarkable increase of the hypopigmentated lesions after her pregnancies at ages 29 and 32 years.

Because of the highly characteristic clinical aspect and the light- and electron-microscopic histopathologic findings, we diagnosed progressive macular hypomelanosis (PMH).

It is a nonscaly disorder with hypopigmented macules mainly on the trunk and is more often seen in young women.

In contrast to some authors assuming the presence of Propionibacterium spp.

as a matter of principle in PMH, we report a case with no evidence for Propionibacterium spp.