Dermoscopy of pigmented purpuric dermatosis

Jihad Kassel, Hanane Baybay, Chaymae Jroundi, Zakia Douhi, Sara Elloudi, Fatima-Zahra Mernissi

Department of Dermatology, University Hospital Hassan II, Fes, Morocco

Corresponding author: Jihad Kassel, MD

How to cite this article: Kassel J, Baybay H, Jroundi C, Douhi Z, Elloudi S, Mernissi F-Z. Dermoscopy of pigmented purpuric dermatosis. Our Dermatol Online. 2022;13(e):e10.

Submission: 20.09.2021; Acceptance: 11.01.2022

DOI:10.7241/ourd.2022e.10

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Pigmented purpuric dermatoses (PPD), are chronic and relapsing disorders characterized by a symmetrical rash of petechial and pigmentary macules confined to the lower limbs, characteristically shows a benign prognosis. The etiology is unknown, Venous hypertension, gravitational dependency, exercise, infections, drug ingestion, and contact allergy to dyes have been implicated as potential triggers Many clinical patterns of pigmented purpuric dermatoses or capillaritis are recognized that may represent different features of the same disorder. These dermatoses are histopathologically similar with a perivascular lymphocyte infiltration, erythrocyte extravasation, and hemosiderin deposition [1]. Some studies have focused on identifying the dermoscopic characteristics of (PPD), the main dermoscopic signs are: Red globules and dots, Brownish patches, Coppery red pigmentation, Annular vessels and comma-like vessel, linear vessels, Red patches, brown dots and a reticular brownish networks [2]. We describe a new case of dermoscopy of (PPD) in a patient with dark skin couleur.

A diabetic, 62-year-old woman, phototype IV, consults for chronic, slightly itchy lesions in the legs, clinical examination showed presence of pigmented macules confluent in the legs, with a diffuse non-infiltrated petechial purpura (Fig. 1), associated with varicosities on the legs and thighs. Dermoscopic examination revealed, Brownish patches, annular vessels (Figs. 2a and 2b). Skin biopsy was done. Histopathologic study was compatible with (PPD).

Figure 1: Clinical picture showing pigmented macules confluent in the legs, with a diffuse non-infiltrated petechial purpura.

Figures: 2a: Dermoscopic picture showing: reticular brownish networks (blue asterisks), red globules(black arrows); 2b: Dermoscopic picture showing, Brownish patches (purple asterisk), Annular vessels (white arrows).

Consent

The examination of the patient was conducted according to the principles of the Declaration of Helsinki.

The authors certify that they have obtained all appropriate patient consent forms, in which the patients gave their consent for images and other clinical information to be included in the journal. The patients understand that their names and initials will not be published and due effort will be made to conceal their identity, but that anonymity cannot be guaranteed.

REFERENCES

1. Gupta A, Sardana K, Kishan Gautam R. Venoprotective drugs in pigmented purpuric dermatoses:A case report. J Cosmet Dermatol. 2018;00:1–4.

2. Dermoscopic Findings and the clinicopathologic correlation of pigmented purpuric dermatosis:a retrospective review of 60 cases. Ann Dermatol. 2021;33:214–21.

Notes

Source of Support: Nil,

Conflict of Interest: None declared.