Linear and Whorled Nevoid Hypermelanosis
Image and content excerpted from the VisualDx clinical decision support system.
VisualDx images show variation in age, skin color, and disease stage. VisualDx has 16 images of Linear and Whorled Nevoid Hypermelanosis.
Full text and additional images for Linear and Whorled Nevoid Hypermelanosis are available in the following VisualDx packages:
757.33 – Congenital pigmentary anomalies of skin
L81.8 – Other specified disorders of pigmentation
SynopsisLinear and whorled nevoid hypermelanosis is a sporadic disorder of asymmetric hyperpigmentation in a streaky or swirl-like pattern. It is also referred to as pigmentary mosaicism. The hyperpigmentation is present at birth or within the first few weeks of life and is not preceded by any other eruptions in the skin. The pigmentation may become more evident over the first few years of life, then stabilizes, and only rarely fades.
In the minority of cases, associated anomalies have been detected involving the central nervous and musculoskeletal systems as well as ocular and other abnormalities.
This disorder most likely represents a mosaic population of neuroectodermal cells, resulting in 2 distinct populations of skin cells having different colors.