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Logo of annaldermaThis ArticleThis JournalAboutInformation for AuthorsOnline SubmissionAnnals of Dermatology
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.,corresponding author and Hyung Ok Kim, M.D.


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

Articles from Annals of Dermatology are provided here courtesy of Korean Dermatological Association and Korean Society for Investigative Dermatology