Progressive macular hypomelanosis
Last Updated: 2021-08-20
Between 10 and 50 years of age. Persons with a darker complexion are more frequently affected, especially with mixed (referring to the Fitzpatrick skin type) parents.
Either genetic or due to propionibacterium acnes, check for reddish fluorescence at the edge of patches with Wood light.
The trunc and sometimes the legs is affected by chronic, disseminated, roundish confluent hypomelanotic patches. No scaling. Median regions most often affected and highest density there.
Fistarol et al. Pigmentstörungen. 2010, JDDG 8: 187-203
Böhm et al. Differenzialdiagnostik der Hypomelanosen. 2015, Hautarzt 66: 945-958
Petersen et al. Propionibacterium Acnes Phylogenetic Type III is Associated with Progressive Macular Hypomelanosis. 2017, Eur J Microbiol Immunol (Bp) 7:37-45.