Familial pityriasis rotunda: A rare case report and a review of literature

Authors

  • Patlada Ingkaninanda DIVISION OF DERMATOLOGY, DEPARTMENT OF MEDICINE, FACULTY OF MEDICINE, RAMATHIBODI HOSPITAL, MAHIDOL UNIVERSITY, BANGKOK, THAILAND
  • Marinya Pongpudpunth DIVISION OF DERMATOLOGY, DEPARTMENT OF MEDICINE, FACULTY OF MEDICINE, RAMATHIBODI HOSPITAL, MAHIDOL UNIVERSITY, BANGKOK, THAILAND

Keywords:

Familial pityriasis rotunda, pityriasis rotunda, pityriasis circinata

Abstract

Pityriasis rotunda is an uncommon skin disease. It is considered to be a disorder of keratinization, which is characterized by well-defined circular, slightly scaly hypo- or hyperpigmented patches over  the trunk and proximal extremities. It can be classified into two types. Type I occurs in blacks or Asians, without family history, possibly in association with an internal malignancy or systemic diseases. Type II occurs more commonly in white or Caucasians. Patients may have a family history but usually not associated with internal malignancy. We report a familial pityriasis rotunda, a first case report in Asian skin, and has no association with malignancy or other systemic diseases.

References

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Published

2026-06-05

How to Cite

Ingkaninanda, P., & Pongpudpunth, M. (2026). Familial pityriasis rotunda: A rare case report and a review of literature. Thai Journal of Dermatology, 30(3), 190–194. retrieved from https://he02.tci-thaijo.org/index.php/TJD/article/view/282718