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CORRESPONDENCE
Year : 2011  |  Volume : 56  |  Issue : 4  |  Page : 450-451
Oligo-lesional eruptions rapidly following a herald plaque: Abortive pityriasis rosea


Skin Diseases Center, Shreeram Sankul, Opp. Hotel Panchavati, Vakilwadi, Nashik, Maharashtra, India

Date of Web Publication10-Sep-2011

Correspondence Address:
Vijay Zawar
Skin Diseases Center, Shreeram Sankul, Opp. Hotel Panchavati, Vakilwadi, Nashik, Maharashtra
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0019-5154.84729

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How to cite this article:
Zawar V. Oligo-lesional eruptions rapidly following a herald plaque: Abortive pityriasis rosea. Indian J Dermatol 2011;56:450-1

How to cite this URL:
Zawar V. Oligo-lesional eruptions rapidly following a herald plaque: Abortive pityriasis rosea. Indian J Dermatol [serial online] 2011 [cited 2019 Sep 18];56:450-1. Available from: http://www.e-ijd.org/text.asp?2011/56/4/450/84729


Sir,

Natural history of pityriasis rosea is characterized by the onset of herald plaque, which is usually an annular eruption of 2-10 cm in size. The latter enlarges for a week or two and is followed by multiple secondary eruptions, reaching peak with numerous lesions in the next 2 weeks and the disease then slowly regresses over the next 2-6 weeks. Thus, the average duration of cutaneous illness lasts for at least 4 weeks. [1],[2],[3],[4]

A 14-year-old boy presented with a mildly pruritic scaly plaque of about 2.5 cm size of discoid morphology on his right buttock, following a week after a transient episode of coryza. Just within a day of noting the onset of a herald plaque, he developed only a few scaly smaller plaques on lower back [Figure 1] and posterior trunk simultaneously [Figure 2]. The lesions were oriented to lines of cleavage and collarette scales were evident on some of the lesions [Figure 3]. There were no eruptions on the anterior trunk and extremities. There was no lymphadenopathy. Clinical examination of genitals, mucous membranes, palms and soles, axillae and groins was normal.
Figure 1: Scaly discoid plaque on right buttock with few smaller eruptions on the lower back

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Figure 2: Similar smaller plaques on the posterior trunk, two on scapular areas and two on the midback, oriented to the lines of cleavage

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Figure 3: Close view of the eruptions showing typical lesions along the Langers lines with collarette scales

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He received no medications before or during the illness. He was sexually inactive. There was no history of similar eruptions in past or family. He had no known drug allergy and did not apply anything on the eruptions before reporting to us.

Skin scrapings from the initial and subsequent lesions were negative for fungus. Complete blood counts and blood sugar level were normal. Venereal Disease Research Laboratory (VDRL) test and HIV antibodies were negative. The skin biopsy revealed acute spongiotic dermatitis with sparse inflammatory dermal infiltrate, leading to no specific diagnosis. However, the clinical diagnosis of pityriasis rosea was convincing, considering the diagnostic criteria of pityriasis rosea. [5] The lesions completely regressed, leaving hypopigmentation, only with vaseline application twice daily within 6 days. There was no recurrence.

Discoid herald plaque rather than the annular one, its rapid transition into the secondary lesions and abortive nature of the disease are unusual features in this case. The duration of entire cutaneous manifestation in this patient was for less than 2 weeks. It is extremely unusual for herald plaque to progress to secondary eruptions within hours. [2] In a recent epidemiological study from India, only about 20% patients had resolution of all secondary eruptions within as short as 16-30 days. [6]

Amer et al.[7] pointed in their study of Black American children that the natural history of pityriasis rosea is different from that mentioned in the textbooks and majority of the children in their study had the secondary eruptions lasting for 2 weeks or slightly more.

The pathogenesis of such abortive nature of lesions is far from clear in our healthy patient. Considering a plausible hypothesis of viral origin in pityriasis rosea, [4] it remains only speculative that this patient had subclinical viral infection and subsequent milder episode due to improved acquired immune response against the same virus, thus containing the disease with restrictive involvement. But, the pathogenesis of pityriasis rosea may be much more complex. [4] Thus, we present a case of abortive pityriasis rosea for its striking and unusual manifestation.

 
   References Top

1.Bjornberg A, Hallgren L. Pityriasis rosea, a statistical, clinical and laboratory investigation of 826 patients and matched healthy controls. Acta Derm Venereol (Stockh)1962;42:1-68.  Back to cited text no. 1
    
2.Gonzalez L, Allen R, Janniger C, Schwartz R. Pityriasis rosea: An important papulo-squamous disorder. Int J D 2005;44:757-64.  Back to cited text no. 2
    
3.Chuh A, Lee A, Zawar V, Sciallis G, Kempf W. Pityriasis rosea-an update. Indian J Dermatol Venereol Leprol 2005;71:311-5.  Back to cited text no. 3
[PUBMED]  Medknow Journal  
4.Drago F, Broccolo F, Rebora A. Pityriasis rosea: An update with a critical appraisal of its possible herpesviral etiology. J Am Acad Dermatol 2009;61:303-18.  Back to cited text no. 4
[PUBMED]  [FULLTEXT]  
5.Chuh AA. Diagnostic criteria for pityriasis rosea-a prospective case control study for assessment of validity. J Eur Acad Dermatol 2003;17:101-3.  Back to cited text no. 5
    
6.Sharma L, Shrivastava K. Clinico-epidemiological study of pityriasis rosea. Ind J Dermatol Venereol Leprol 2008;74:647-9.  Back to cited text no. 6
    
7.Amer A, Fischer H, Li X. The natural history of pityriasis rosea in black American children: How correct is the "classic" description? Arch Pediatr Adolesc Med 2007;161:503-6.  Back to cited text no. 7
[PUBMED]  [FULLTEXT]  


    Figures

  [Figure 1], [Figure 2], [Figure 3]

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