A comparison of dermoscopic features of pigmented purpuric dermatoses and pigmented purpuric dermatosis-like mycosis fungoides.

Authors

Handan Merve Erol Mart, Zeynep Keskin, Hatice Sanli, Aylin Okcu Heper, Ayca Kirmizi, Bengu Nisa Akay

Published in

Acta dermatovenerologica Alpina, Pannonica, et Adriatica. Volume 35. Issue 3. Pages 167-172.

Abstract

Pigmented purpuric dermatosis-like mycosis fungoides (PPD-MF) is an uncommon clinical presentation of mycosis fungoides characterized by purpuric lesions that may closely mimic pigmented purpuric dermatosis (PPD). This study evaluates dermoscopic features that may help differentiate PPD-MF from PPD.
This retrospective study assesses the diagnostic utility of dermoscopy in distinguishing PPD from PPD-MF. It included 11 patients with histopathologically confirmed PPD-MF and 19 patients with PPD. Categorical variables were compared using Fisher's exact test.
Curved vessels, straight vessels, serpentine vessels, and curved linear vessels with a terminal dot were significantly more frequent in PPD-MF. In contrast, an orangish-brown background and white lines were significantly more common in PPD.
Dermoscopy may provide useful supportive clues for distinguishing PPD-MF from PPD, particularly through the assessment of vascular morphology and background color. However, because of overlapping clinical and dermoscopic features, dermoscopic findings should be interpreted together with clinicopathological and immunohistochemical evaluation. Further studies with larger sample sizes and follow-up data are warranted to validate these findings.

PMID:
42809764
Bibliographic data and abstract were imported from PubMed on 30 Sep 2026.

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