Indian Dermatology Online Journal

: 2021  |  Volume : 12  |  Issue : 3  |  Page : 486--487

Unilateral linear capillaritis

Piyush Kumar1, Chirag Desai2, Anupam Das3,  
1 Department of Dermatology, Katihar Medical College and Hospital, Katihar, Bihar, India
2 Divya Sparsh Skin and Hair Clinic, Mumbai, Maharashtra, India
3 Department of Dermatology, KPC Medical College and Hospital, Kolkata, West Bengal, India

Correspondence Address:
Anupam Das
Building “Prerana” 19 Phoolbagan, Kolkata - 700 086, West Bengal

How to cite this article:
Kumar P, Desai C, Das A. Unilateral linear capillaritis.Indian Dermatol Online J 2021;12:486-487

How to cite this URL:
Kumar P, Desai C, Das A. Unilateral linear capillaritis. Indian Dermatol Online J [serial online] 2021 [cited 2021 Jul 28 ];12:486-487
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Full Text

A 6-year-old otherwise healthy girl presented with gradually progressive asymptomatic hyperpigmented patches of bizarre shape, on the medial aspect of the left leg, present for the preceding 11 months [Figure 1] and [Figure 2]. There was no history of any bleeding disorder, and the rest of the medical and family history was non-contributory. There was no history of any trauma to the area or application of any drugs prior to the onset of the lesions. Dermoscopy showed linear vessels, brown reticular lines, red dots, and clods with a brown-pigmented network (Dermlite DL4, ×10, polarized light) [Figure 3]. Biopsy showed moderately dense superficial perivascular and interstitial infiltrate of lymphocytes and histiocytes. The papillary dermis showed a sparse deposition of hemosiderin. Numerous extravasated red blood cells were noted in the papillary dermis. Besides, few histiocytes showed intracellular deposition of hemosiderin [Figure 4]. A diagnosis of unilateral linear capillaritis was done and the parents were counseled regarding the benign nature of the disease.{Figure 1}{Figure 2}{Figure 3}{Figure 4}

Unilateral linear capillaritis is an uncommon but increasingly recognized variant of pigmented purpuric dermatoses. It was first described in 1992 by Riordan et al., as a benign inflammation of capillaries.[1] Its striking clinical appearance along a dermatome on one limb clinches the diagnosis. On dermoscopy, red dots and clods correspond to extravasated blood, linear structures correspond to telangiectatic vessels and the brown pigmentation in the background represents hemosiderin. There is insufficient evidence to recommend a particular therapeutic option. However, counseling holds paramount importance, to avoid unnecessary treatment.[2]

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

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1Riordan CA, Darley C, Markey AC, Murphy G, Wilkinson JD. Unilateral linear capillaritis. Clin Exp Dermatol 1992;17:182-5.
2Ma HJ, Zhao G, Liu W, Dang YP, Li DG. Unilateral linear capillaritis: Two unusual Chinese cases. Eur J Dermatol 2007;17:160-3.