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Year : 2016  |  Volume : 7  |  Issue : 3  |  Page : 224-225  

Type B pigmentary demarcation lines


Department of Dermatology, Venereology and Leprology, Rabindra Nath Tagore Medical College, Udaipur, Rajasthan, India

Date of Web Publication13-May-2016

Correspondence Address:
Lalit Kumar Gupta
Department of Dermatology, Rabindra Nath Tagore Medical College, Udaipur - 313 001, Rajasthan
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2229-5178.182366

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How to cite this article:
Gupta LK, Srivastava A, Khare AK, Mittal A, Balai M, Mehta S. Type B pigmentary demarcation lines. Indian Dermatol Online J 2016;7:224-5

How to cite this URL:
Gupta LK, Srivastava A, Khare AK, Mittal A, Balai M, Mehta S. Type B pigmentary demarcation lines. Indian Dermatol Online J [serial online] 2016 [cited 2019 Dec 9];7:224-5. Available from: http://www.idoj.in/text.asp?2016/7/3/224/182366

A 29-year-old female presented with 2 months history of asymptomatic, bilaterally symmetrical, non scaly, pigmented band involving buttocks, thighs and legs upto ankles posteromedially [Figure 1] and [Figure 2]. The medial border of the pigmentary band was sharply demarcated while laterally it merged imperceptibly into the surrounding normal skin. The pigmentation was noticed by her during the 9th month of second pregnancy. She had not received any hormonal therapy during pregnancy. There was no history of similar pigmentary alteration during previous pregnancy. Her medical and obstetric history were unremarkable. None in the family had similar pigmentation. Based on history and examination, a diagnosis of type B pigmentary demarcation lines (PDL) associated with pregnancy was made.
Figure 1: Type B pigmentary demarcation lines on lower extremities

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Figure 2: Close up view of PDL on thighs

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   Discussion Top


Pigmentary demarcation lines, also known as Futcher's lines or Voigt's lines, are physiological lines which correspond to borders of abrupt transitions between deeply pigmented surfaces and lighter surfaces. Presently they are classified into 8 types: Type A through H.[1] Out of these, type B is commonly associated with pregnancy usually occurring after the 7th month of pregnancy and regressing after delivery.[2] These lines have been regarded as a physiological change during pregnancy.

The exact pathogenesis of PDL is unknown. They have been considered as an atavistic remnant, where the dorsal skin is pigmented more than the ventral to provide better protection from the sun.[3] Hormonal alterations in the levels of estrogen, progesterone, and melanocyte-stimulating hormone during pregnancy are likely to be involved.[4],[5] Neurogenic inflammation due to trapping of the cutaneous nerves by the enlarging uterus [6] and genetic factors [3] may be contributory. Counseling and reassurance is what is generally required owing to the benign and self limiting nature of the condition.

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Conflicts of interest

There are no conflicts of interest.

 
   References Top

1.
Somani VK, Razvi F, Sita VN. Pigmentary demarcation lines over the face. Indian J Dermatol Venereol Leprol 2004;70:336-41.  Back to cited text no. 1
[PUBMED]  Medknow Journal  
2.
Peck JW, Cusack CA. Futcher lines: A case report in pregnancy and literature review. Cutis 2013;92:100-1.  Back to cited text no. 2
    
3.
James WD, Carter JM, Rodman OG. Pigmentary demarcation lines: A population survey. J Am Acad Dermatol 1987;16:584-90.  Back to cited text no. 3
    
4.
Gupta LK, Kuldeep CM, Mittal A, Paliwal V, Singhal H, Agarwal K, et al. Pigmentary demarcation lines in pregnancy. Indian J Dermatol Venereol Leprol 2005;71:292-3.  Back to cited text no. 4
[PUBMED]  Medknow Journal  
5.
Cho E, Lim JH, Kim HS, Park YM, Lee JY, Kim HO. Type B pigmentary demarcation lines of pregnancy involving the anterior thighs and knees. Ann Dermatol 2012;24:348-50.  Back to cited text no. 5
    
6.
Ozawa H, Rokugo M, Aoyama H. Pigmentary demarcation lines of pregnancy with erythema. Dermatology 1993;187:134-6.  Back to cited text no. 6
    


    Figures

  [Figure 1], [Figure 2]



 

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