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Pigmentary demarcation lines associated with pregnancy
T Nakama1, K Hashikawa, M Higuchi
1Department of Dermatology, Kurume University School of Medicine, Kurume, Japan. takekuni@med.kurume-u.ac.jp
Clinical and Experimental Dermatology
|June 4, 2009
Summary
Pigmentary demarcation lines (PDLs) are skin markings that can appear during pregnancy, typically after the seventh month. These harmless, cosmetic changes usually fade after childbirth, though awareness among healthcare providers is recommended.
Area of Science:
- Dermatology
- Obstetrics and Gynecology
Background:
- Pigmentary demarcation lines (PDLs) are linear hyperpigmented streaks on the skin.
- While PDLs can occur for various reasons, their association with pregnancy is less commonly reported.
Observation:
- This report details three new cases of PDLs during pregnancy.
- A review of 19 previously reported cases in Japan was conducted, including the three new cases.
- The majority of PDL cases occurred in the third trimester of pregnancy.
Findings:
- In all but one case, the pigmentation resolved spontaneously within a few months postpartum.
- Type B PDLs were the most frequently observed type, with two cases exhibiting both Type A and Type B lines.
- The study suggests that PDLs during pregnancy may be underreported, with three cases observed within a three-month period.
Implications:
- Pigmentary demarcation lines are primarily a cosmetic concern for patients.
- Two of the three reported cases initially sought consultation with obstetricians.
- Dermatologists and obstetricians should be aware of the potential association between PDLs and pregnancy to ensure accurate diagnosis and patient counseling.
