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Dermoscopic Polymorphism of a Pigmented Eccrine Poroma on the Leg: A Diagnostic Pitfall

Year: 2026

Type: article

Abstract: Pigmented eccrine poroma (PEP) is a rare benign adnexal tumor that can closely mimic melanoma clinically and dermoscopically, particularly when it occurs on non-acral locations. We report the case of a 31-year-old man who presented with a slow-growing, well-circumscribed brown nodule on his left leg that had been evolving for four years. Dermoscopy revealed a polymorphic pattern with chalice-form vessels, perivascular white halos, a frog's egg appearance, and structureless blue and white areas suggestive of melanoma. Histopathological examination confirmed the diagnosis of pigmented eccrine poroma. Complete surgical excision was performed with no recurrence at two-year follow-up. This case highlights the importance of recognizing the characteristic dermoscopic features of PEP to avoid unnecessary aggressive procedures and patient anxiety.

Source: Cureus

DOI: 10.7759/cureus.115163

Authors: Sofia Elhaitamy, Meryem Soughi, Salma Kozmane, Layla Tahiri Elousrouti, Fatima zahra Mernissi

Institutions: Centre Hospitalier Universitaire Hassan II, Sidi Mohamed Ben Abdellah University

Language: English

Topic: Cancer and Skin Lesions

Subfield: Dermatology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: diamond

OpenAlex ID: W7204186520

FWCI:

Cites: 13

Cited by:

Related to: 10