Type B Pigmentary Demarcation Lines of Pregnancy Involving the Anterior Thighs and Knees

doi:10.5021/ad.2012.24.3.348

Ann Dermatol. 2012 August; 24(3): 348–350.

Published online 2012 July 25. doi: 10.5021/ad.2012.24.3.348

PMCID: PMC3412246

Type B Pigmentary Demarcation Lines of Pregnancy Involving the Anterior Thighs and Knees

Eujin Cho, M.D., Jong Ho Lim, M.D., Hei Sung Kim, M.D., Young Min Park, M.D., Jun Young Lee, M.D., and Hyung Ok Kim, M.D.

Department of Dermatology, College of Medicine, The Catholic University of Korea, Seoul, Korea.

Corresponding author.

Corresponding author: Jun Young Lee, M.D., Department of Dermatology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 137-701, Korea. Tel: 82-2-2258-1386, Fax: 82-2-594-3255, Email: jylee/at/catholic.ac.kr

Received March 4, 2011; Revised May 25, 2011; Accepted June 22, 2011.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Pigmentary demarcation lines are abrupt transition lines between the areas of deeper pigmentation and the areas of lighter, normal pigmentation. Type B pigmentary demarcation lines involve the posterior medial portion of the lower extremities and are more commonly associated with pregnancy. We present a case of pigmentary demarcation lines of pregnancy with erythematous changes, involving both the anterior and posterior aspects of the lower extremities.

Keywords: Erythema, Knee, Pigmentation, Pregnancy, Thigh

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