Your browser does not support javascript:   Search for gard hereSearch for news-and-events here.


Genetic and Rare Diseases Information Center (GARD)

Print friendly version

Pityriasis rotunda

See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.


Newline Maker

What causes pityriasis rotunda?

The exact cause of pityriasis rotunda is unknown, but some researchers believe that it may be a variant of ichthyosis vulgaris.[1][2] Other researchers believe that pityriasis rotunda is caused by malnutrition, but this is not universally accepted. The presence of systemic disease, which is characteristic of type 1 pityriasis rotunda, appears to be most common in South African and Japanese individuals, but is less common among Caucasians.[2] Type 1 most often occurs with stomach cancer and liver cancer. Other conditions that type 1 pityriasis rotunda has been associated with include:[1][2]
It has been proposed that type 2 pityriasis rotunda, which is typically inherited in families and seen in lighter skinned individuals, is inherited in an autosomal dominant manner.[1]
Last updated: 1/19/2012

  1. Pityriasis rotunda . DermNet NZ. July 2011; Accessed 1/17/2012.
  2. Rao J. Pityriasis rotunda. eMedicine. March 2009; Accessed 1/18/2012.